4(x+2)-12x+1=15(x-1)+42
4(х+2)-12х+1=15(х-1)+42 4х+8-12х+1=15х-15+42 -8х-15х=-15+42-1-8 -23х=16 Х=-16/23
4(х+2)-12х+1=15(х-1)+42 4х + 8 - 12х + 1 = 15х - 15 + 42 4х - 12х - 15х = -15 + 42 - 8 - 1 - 23х = 18