Question

hat does x in the solution equal in the following system of equations?

–2x + y = 5
y = 2 – x

Answer 1

x = -1

Answer 2

Subtracting the second equation from the first,\[-2x+y-y=5-2+x\]\[-2x=3+x\]\[-3x=3\]\[x=-1\]

Answer 3

Thanks

Answer 4

y = 2 – x , y+x=2 time(2)=2y+2x=4
2y+2x=4
y -2x =5
ADD--------------
3y=9
y=9/3
y=3
Substitution y=3 find x
–2x + y = 5
–2x + 3 = 5
-2x=5-3
x=2/-2
x=-1