Set them equal to each other since x = x.
8x + 36 = 5x +60
-5x -5x
3x + 36 = 60
-36 -36
3x = 24
/3 /3
x = 8
Plug in to check
8(8) + 36 = 5(8) +60
64 + 36 = 40 + 60
100 = 100
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