math help please
posted by Deborah .
Solve the following system of equations using substitution. What is the value of y?
2x + 3y = 105
x + 2y = 65
A.15
B.25
C.40
D.65
I think it is B??

pshh. that's easy it's D!

Can you explain and show me how to work this problem?

x = 65  2y
2x + 3y = 105
Substitute 652y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.
It definitely is not D! You are right with B.