oblicz rownania 3/4 x +1/2=1/5x+1 / razy 20 3/5x +1/3=7/15x-2/ razy 15

a) 3/4x + 1/2 = 1/5 x + 20 /-1/2 3/4x=1/5x+19 1/2 /-1/5x 1/20x=19 1/2 /:1/20 x=390 b)3/5x + 1/3 = 7/15x - 30 /-1/3 3/5x = 7/15x - 30 1/3 /+7/15 16/15x = 30 1/3 / : 16/15 x=28 7/16