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3 years ago

3x+y=4 x+2y=-2 what is the answer

Mathematics

1 answer:

Taya2010 [7]3 years ago

3 0

Answer:

2(3x+y=4)

1(x+2y=-2)

6x+2y=8

(-) x+2y=-2

5x=10

x=2

x+2y=-1

2+2y=-1

-2 -2

2y=-3

y=-3/2

Step-by-step explanation:

multiply the first equation by 2 to make y equal to each other.
subtract to eliminate y
divide by 5 to get x
take one of the equations
replace x by 2 to solve for y

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