Solve 4x 5 21 July 8, 2019 16 32 64 128 Solve x 4x 5 21 Solve for x 4x 5 21 class 9 Solve the equation 4x 5 21 Solve the following equation 4x 5 21 Solve for x if 4x 5 21 Solve 2x 21 4x 5 Solve (4x – 5)2 = 9