3 x 3 )- 7 5 x 4 ) 18 July 8, 2019 16 32 64 128 3 x 3 )- 7 5 x 4 )+ 18 5 x 7 = 35 3 x-5=x+3 3) 2 x + 3 x - 18 = x - 7 x + 15 4) 4 x + 5 x - 3 = 2 x + 11