emilychaarte emilychaarte

20-09-2021
Mathematics

contestada

Find the x and y of x-3y=15 and -2x-4y=10

Find the x and y of x3y15 and 2x4y10 class=

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stickykey stickykey

20-09-2021

Use elimination to create a one variable equation.

x-3y=15 -> 2x-6y=30

2x-6y=30

+(-2x-4y=10)

------------------

-10y=40

Then solve (for y in this case).

y=-4

Now we can use the value for y to solve for x.

x-3y=15 -> x-3(-4)=15 -> x=3

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