In substitution, replace the y in the first equation with what y equals. In this case, y= -x+13.
-x+13 +5x= 37
4x+ 13= 37
4x= 24
x= 6
Explanation: First combination like terms, -x and 5. 5x-1x = 4x. Next, follow the opposite of PEMDAS. Adding and subtracting are last, so subtract the 13 on each side. All that's left is dividing the 4 on each side, and you're left with 6.
