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You have to do some manipulations to the equation, until the variable remains alone on one side. The manipulations involve doing the same operation to both sides of the equation. Here is an example:
Solve "2x + 3 = 15" for x.
To get the "x" alone on one side, you have to get rid of the "2" and of the "3". Getting rid of the "3" first is simpler in this case. To get rid of the 3, you subtract 3. Note that you always have to do the same operation on both sides.
2x + 3 - 3 = 15 - 3
2x = 12
Next you get rid of the 2. This is done by dividing both sides by 2.
(2/2) x = 12/2
x = 6
This is the solution in this case.
What else can I help you with?
How do you solve a problem that has a variable with an exponent?
multiply
How do you use substitution to solve equations?
You plug in what the variable is equal to for that variable then you will be able to finish the problem
How do you solve system of eqaution by subsitution?
To solve a system of equations by substitution, first solve one of the equations for one variable in terms of the other. Then, substitute this expression into the other equation. This will give you an equation with only one variable, which you can solve. Finally, substitute back to find the value of the other variable.
How can variables be used to help solve a math problem?
If you don't know something in a math equation you can replace it with a variable and then solve it algebraically.
How do you use variables to help solve math questions?
You use variable in math problems to help you solve the answer. For example, you could do 50+50=a. The (a) would be the variable. Or for that same problem you could do 50+y=100. Then the (y) would be the variable.
How do you solve an or problem if a variable is unrestricted in sign?
Solve the problem using the + sign for the variable. Then solve the problem using the - sign for the variable. Report your answer as the answer that you got using + or the answer that you got using -.
How do you solve a problem that has a variable with an exponent?
multiply
How do you use substitution to solve equations?
You plug in what the variable is equal to for that variable then you will be able to finish the problem
Four steps to the elimination method?
There are four steps in an algebraic elimination problem. These steps are: to find a variable with equal or opposite coefficients, if equal then subtract the equations but if opposite then add, solve one variable equation left, and then substitute known variable into other equation and solve. hi
How do you solve algebras?
Get the variable by itselfWell my name is george, and thanks to intergers you can easily solve this problem correctly.
How do you solve system of eqaution by subsitution?
To solve a system of equations by substitution, first solve one of the equations for one variable in terms of the other. Then, substitute this expression into the other equation. This will give you an equation with only one variable, which you can solve. Finally, substitute back to find the value of the other variable.
What does the variable represent in an addition or subtraction expression?
it is the number you would use to solve the problem
With the substitution method which variable should you solve for first?
It often doesn't matter which one you solve for first. But if you can easily solve one of the equations for one of the variables, that's the one you should solve for.
How can variables be used to help solve a math problem?
If you don't know something in a math equation you can replace it with a variable and then solve it algebraically.
How doI solve system of equations by substitution?
Assuming the simplest case of two equations in two variable: solve one of the equations for one of the variables. Substitute the value found for the variable in all places in which the variable appears in the second equation. Solve the resulting equation. This will give you the value of one of the variables. Finally, replace this value in one of the original equations, and solve, to find the other variable.
How do you use variables to help solve math questions?
You use variable in math problems to help you solve the answer. For example, you could do 50+50=a. The (a) would be the variable. Or for that same problem you could do 50+y=100. Then the (y) would be the variable.
How do you find zeros of a polynomial?
If there is one variable. Then put each variable equal to zero and then solve for the other variable.
