30x - 20 = 50 use inverse operations to isolate x 30x - 20 = 50 + 20 +20 30x = 70 (30x = 70) /30 x= 7/3 (this is the simplified term)

30x + 20 = 50 20 + -20 + 30x = 50 + -20 0 + 30x = 50 + -20 30x = 50 + -20 50 + -20 = 30 30x = 30 x = 1