Question

Solve the following: X=5y-3 X+y=9

Answer 1

One way is to subsitute
since we know that x=5y-3, we can subsiutte that for x in the second equation

5y-3+y=9
6y-3=9
add 3
6y=12
divide 6
y=2
subsitute
x+y=9
x+2=9
subtract 2
x=7

x=7
y=2

Answer 2

$x=5y-3\\x+y=9\\(5y-3)+y=9\\6y-3=9\\6y=12\\y=2\\\\x=5(2)-3\\x=10-3\\x=7$

x = 7
y = 2