5 3 x )- 4x 18 July 8, 2019 16 32 64 128 3 5 x 10 )= 18 4x 1 4x 2x 5 x 3 18 3 x 2 )+ 2 4x 5 )= 18 3 x-5=x+3 5 x 5 x 5 x 5 x 5 5 x 5 x 5 5 x 7 = 35