3 19 5 )) x 2 4 July 8, 2019 16 32 64 128 Factorise 3 5x 2 19 5 x 4 Factorise 2x 3 5 x 2 19 x 42 3 5 x 2 4 5 x 1 19 5 10 6x 5 x 3 4 2 4x 19 3 x-5=x+3 3 x +4=19 3 х +4=19
