Question

what is the solution of this linear system
3x+y=-2
y=-x+4

Answer 1

Put what y is equal to back into the first equation, so \[3x+(-x+4)=-2\]

Answer 2

Combine like terms first.
\[3x-x+4=-2\]
\[2x+4=-2\]
Then you can subtract the 4 from both sides to get x on one side.
\[2x=-6\]
To finish, just divide both sides by 2 to find what x is equal to.

Answer 3

\[x=-3\]

Answer 4

got it thanks