Решите пример 15(х+2)-30=12х
15х +30 -30 = 12х 15х -12х =0 3х =0 х = 0
15(х + 2) - 30 = 12х 15 (х + 2) - 12х = 30 15х + 15 *2 - 12х = 30 15х + 30 -12х = 30 15х - 12х = 30 - 30 3х = 0 х = 0 : 3 х = 0