Verified answer

3(4х+13)-25=74

12х+39-25=74

12х=74+25-39

12х=60

х=60:12

х=5

проверка

3(4*5+13)-25=74

3(20+13)-25=74

3*33-25=74

99-25=74

74=74

Verified answer

 3(4х+13)-25=74
12x+39-25=74
12x=74-39+25
12x=60
x=60/12
x=5