James used substitution to solve this system of equations. Which could be the result of his first step 2x+3y=12
y=x+1.5
A..y=2x+3y+1.5
B.2x+3(x+1.5)=12
C.2x+3x+1.5=12
D. y=2x+3y

B, it's B because the system gives you what Y equals and so you need to substitute (x+1.5) for the y in your equation. From there solve to get- 2x+3x+4.5=12. From here you will want to add like terms, 2x+3x= 5x. Your new equation should look like this- 5x+4.5=12. From here solve for x.