Question

what is the solution of the linear equation
x-2y+=-16
2x+y=18
somebody please

Answer 1

First you have to get Y by itself.
x-2y= -16
-2y= -16-x
Divide -2 make sure its positive y
y= 8+x
y= x+8 either one.

Second one goes the same
2x+y=18
-2x
y=-2x+18

Answer 2

x-2y+=-16 ------ (A)
2x+y=18 ------ (B)

from (B) you get, by rearranging, y = 18 - 2x
substitute this in (A)
x - 2(18 - 2x) = -16
x - 36 + 4x = -16
5x = -16 + 36
x = 20/5
x = 8
substitute this in (B)
2(8) + y = 18
16 + y = 18
y = 18 - 16
y = 2

so solution is x = 8 and y = 2