4(x+2)-12x+1=15(x-1)+42

4(х+2)-12х+1=15(х-1)+424х+8-12х+1=15х-15+42-8х-15х=-15+42-1-8-23х=16Х=-16/23

4(х+2)-12х+1=15(х-1)+424х + 8 - 12х + 1 = 15х - 15 + 424х - 12х - 15х = -15 + 42 - 8 - 1- 23х = 18