Question

help, medals will be given!!
Solve
y = 3x + 4
-2x – y = 21
What is the value of x?

Answer 1

you could just sub 3x + 4 in for y in the 2nd equation to find x.

Answer 2

Are you doing substitution or elimination, or does it not matter? @maria.alison

Answer 3

-2x - y = 21
-2x -(3x + 4) = 21
-2x -3x - 4 = 21
-5x = 21 + 4
-5x = 25
x = -5

Answer 4

(-5,-11)
like kelliegirl33 said, x=-5, and also, y=-11:
put -5 in the y=3x+4 equation
so y=3(-5)+4
y=-15+4
y=-11

Answer 5

thanks yall!

Answer 6

yw :)