carina43 carina43 01-05-2020 Mathematics contestada The steps below show the incomplete solution to find the value of x for the equation 7x - 3x - 4 = -1 + 21: Step 1: 7x - 3x - 4= -1 + 21 Step 2: 7x - 3x - 4 = 20 Step 3: 4x - 4 = 20