Answer:Step 2: Subtraction Property of EqualityStep-by-step explanation:40 - 15x = 5x + 70 - 5x - 5x______________40 - 20x = 70-40 - 40___________β20x = 30____ __ β20 β20x = β1Β½* You deal with the variables and coefficients first before the initial values, plus, use inverse operations when moving terms to one side.I am joyous to assist you anytime.