For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?

3x + y = 8
-x - 2y = -10

A. -2y + 10

B. 2y + 10

C. 2y - 10

D. -2y - 10

Question

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?

3x + y = 8
-x - 2y = -10

 A. -2y + 10

 B.  2y + 10

 C. 2y - 10

 D. -2y - 10

johnweldon1993 · Answer

if you isolated 'x' in the second equation////you would add 2y to both sides

-x = -10 + 2y

and then divide through by '-'

x = -2y + 10

See how that completely isolates 'x'?

anonymous · Answer

no..