MATH
posted by Emily on .
Solve for y in the following system of equations:
x  y = 1
3x + 5y = 21

to Eliminate x
x  y = 1
3x + 5y = 21
multiply (x  y = 1) by 3
3x + 3y = 3
3x + 5y = 21
add both equations
0 + 8y = 24
8y = 24
y = 3