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If they have the same exponential power, then you should just be able to add/subtract them. Yet if the powers differ, you are not allowed to add/subtract them. If the two variables are of different names, you have to leave them separate.
Example:
3x+7x=50
10x=50
x=5
2x-5y=89
(you cannot combine x's and y's; therefore, you cannot find an exact value for either variable)
What else can I help you with?
What reduces an equation that has two variables to an equation that has one variable. It is then possible to find the solution for this variable.?
substitution
What does the b stand for in an equation?
In an equation b or any other letters usually denotes the unknown variable.
To use inverse operations on both sides of an equation until the variable appears by itself on one side?
Isolate the variable
When should you use the addition property of equality to eliminate one variable in a system of equation?
When the coefficient of that variable, in which you want to eliminate, is negative.
How do use substitution when solving system of equations?
You use substitution when you can solve for one variable in terms of the others. By substituting, you remove one variable from the equation, which can then be solved. Once you solve for one variable, you can use substitution to find the other.
How to write an equation that includes the keyword "how to write an equation"?
To write an equation that includes the keyword "how to write an equation," you can use a variable like x to represent the phrase. For example, the equation could be x "how to write an equation."
Why do you use an inverse operation?
Inverse operations are used to undo mathematical operations and isolate a variable. They help to solve equations and simplify expressions by moving operations to the opposite side of the equation. This allows us to find the value of the variable that makes the equation true.
How do you write ten dollars more than twice your savings as a variable expression?
we will use the variable 's' to represent your savings: 2s+10
How do you use different techniques to solve linear equations?
1. Elimination: Select two equations and a variable to eliminate. Multiply each equation by the coefficient if that variable in the other equation. If the signs of the coefficient for that variable in the resulting equations are the same then subtract one new equation from the other. If they have opposite signs then add them. You will now have an equation without that variable. Repeat will other pairs and you will end up with one fewer equation and one fewer variable. Repeat this process: after each round you will have one fewer equation and one fewer variable. Keep going until you are left with one equation in one variable. Solve that. Then work backwards solving for the other variables.2. Substitution: Select a equation and a variable. Make that variable the subject of the equation. The right hand side of this equation is an expression for that variable. Substitute this expression for the variable is each of the other equations. Again, one fewer equation in one fewer variable. Continue until you are left with one equation in one variable. Solve that. Then work backwards solving for the other variables.3. Matrix inversion: If A is the nxn matrix of coefficients, X is the nx1 [column] matrix of variables and B is the nx1 matrix of the equation constants, then X = A^-1*B where A^-1 is the inverse of matrix A.
How do solve for the variable over a number in a linear equation?
Well a variable in a number in a linear equation is basically the variable divided by a number. So if you have x over 10, it is basically x times 1/10. You can solve by having either another equation and use either point slope or y=mx+b.
How do you use word variable in a sentence?
My rates are variable, depending upon how difficult the job is.In the algebraic equation "4x-8=32," "x" is the variable.The variable of this proublem will be x.
How do you solve a equation using unknown variables?
You don't use unknown variables to solve an equation. The purpose of solving an equation is to find the value of the variable so that it's no longer unknown.
