Question

Misha solves the following system of equations using the substitution method.
y=5−2x
3x−y=15
What is the single-variable equation she solves after substituting?
A) 15+3x=5−2x
B) 3x−5−2x=15
C) 3(5+x)=5−2x
D) 3x−(5−2x)=15

Answer 1

I think that it's D