Question

What is the value of Y in the solution of the system of equations?
5x+y=9
10x-7y=-18

Answer 1

You can use substitution or addition to solve the system. By substitution you need to solve one of the equations for x or y, then plug in that into the other equation replacing x or y.

Answer 2

For example, your second equation solved for y would be y=(18+10x)/7

Answer 3

Then replace that into the first equation, giving you 5x+(18+10x)/7 = 9

Answer 4

Solve for x first, then you can solve for y once you have the value of X

Answer 5

so y=9 is the answer

Answer 6

okay thanks!