6(1 + 5v) = 5(1 + 6v)

4(x + 3,6) = 3x – 1,4

3,4 – 0,6b= 2b – (0,4b+ 1)

– 3(y + 2,5) = 6,9 – 4,2y
с решением

6*1+6*5v=5*1+5*6v6+30v=5+30v30v-30v=5-6v=-14*x+4*3.6=3x-1.44x+14.4=3x-1.44x-3x=-1.4-14.4x=-15.8-3у-3*2,5=6,9-4,2у-3у-7,5=6,9-4,2у-3у+4,2у=6,9+7,51,2у=14,4у=14,4:1,2у=12