SOLUTION: what is 2x+4y=30 -2x-2y=-21.5 i dont understand how to do this

SOLUTION: what is 2x+4y=30 -2x-2y=-21.5 i dont understand how to do this

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Question 1010075: what is 2x+4y=30 -2x-2y=-21.5 i dont understand how to do this
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

here you are given two linear equations ( both graph is a line)
you need to solve this system and find and value that makes both equations true

--------------------add both to eliminate one unknown variable, in your case you can eliminate and

now, go back to , substitute for and solve for

so, your lines are intersecting in one point and that point is:
(,)

let's see it on a graph:

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