0
Simple systems of linear equations involve two equations and two variables. Graphically this may be represented by the intersection of lines in a plane. If the two equations describe the same line or parallel lines, there is no solution.
Example:
x + y = 7
2x - y = 8
We might rewrite the first equation as x = 7 - y (subtracting y from each side).
Then we can substitute 7-y for x in the second equation:
2(7-y) - y = 8
By the distributive property of multiplication over addition this yields:
14 - 2y - y = 8
14 - 3y = 8 (combining -2y and -y)
14 = 8 + 3y (add 3y to each side)
6 = 3y (subtract 8 from each side)
2 = y (divide each side by 2).
If y = 2, we can substitute this back into either equation. The first looks like it would be the easiest: x + 2 = 7.
x is therefore 5.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How do you solve linear equations with bracets?
You simplify the brackets first and then you will have linear equations without brackets!
How do you do linear equations?
To solve linear equations, you always use the inverse operations
What is the solution of a system of linear equations in two variables?
The solution of a system of linear equations is a pair of values that make both of the equations true.
What is inconsistent system of linear equation?
It is a system of linear equations which does not have a solution.
What are two or more linear equations using the same variables called?
A system of linear equations.
How can you solve a system of equations?
The answer depends on whether they are linear, non-linear, differential or other types of equations.
What is the definition of Simultaneous Linear Equations?
A system of linear equations is two or more simultaneous linear equations. In mathematics, a system of linear equations (or linear system) is a collection of linear equations involving the same set of variables.
Is linear algebra and linear equations the same?
Linear Algebra is a branch of mathematics that enables you to solve many linear equations at the same time. For example, if you had 15 lines (linear equations) and wanted to know if there was a point where they all intersected, you would use Linear Algebra to solve that question. Linear Algebra uses matrices to solve these large systems of equations.
How do you solve linear equations with bracets?
You simplify the brackets first and then you will have linear equations without brackets!
How do you do linear equations?
To solve linear equations, you always use the inverse operations
What are two symbolic techniques used to solve a system of linear equations in two variables?
I have never seen the term 'symbolic' used in this way. There are 4 methods used to solve a system of linear equations in two variables. Graphing, Substitution, Elimination, and Cramer's Rule.
If you are asked to solve a system of equations in which there is no linear equation to start with you can sometimes begin isolating and substituting a variable that is squared in both equations?
true
If you are asked to solve a system of equations in which there is no linear equation to start with you can sometimes begin by isolating and substituting a variable that is squared in both equations.?
true
Why is linear equations called linear equations?
Because its linear and the equation is a problem to solve
What methods can be used to solve a system of equations?
The answer depends on the nature of the equations. For a system of linear equations, the [generalised] inverse matrix is probably simplest. For a mix of linear and non-linear equations the options include substitution, graphic methods, iteration and numerical approximations. The latter includes trail and improvement. Then there are multi-dimensional versions of "steepest descent".
If you're asked to solve a system of equations in which there is no linear equation to start with you can sometimes begin by isolating and substituting a variable that is squared in both equations?
true
How do you solve linear equations?
I DON'T KNOW...... TEACH ME!!?!?!?!?!?!
