Question

Solve this system of equations by addition
-3x-y=1
-4x+y=-15

Answer 1

ok the y's are already set up to be eliminated, so first combine the two equations

Answer 2

add

Answer 3

-7x=-14 is that correct?

Answer 4

yes. and now you can solve for x

Answer 5

ok x = 2

Answer 6

yep. now substitute 2 for x in either equation to solve for y

Answer 7

ok

Answer 8

-7?

Answer 9

yep :)

Answer 10

thx

Answer 11

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