19 4 5x July 8, 2019 16 32 64 128 8x 4 19 5x 2x 19 5x 4 19 - 5x 4 54 19 =- 4 2 5x 10 Solve 19 4 5x 19 ≤ − 5x 4 54 3 5x2 19 5x 4 3 5x2 19 5x 4 factorise 19 3 7 5x 4 19+4 5 19 x 4 5
