Question

уравнение:720:(5x-12)-56=34

Answer 1

720:(5х-12)-56=34
720:(5х-12)=34+56
720:(5х-12)=90
5х-12=720:90
5х-12=8
5х=8+12
5х=20
х=20:5
х=4
проверка
720:(5*4-12)-56=34
720:(20-12)-56=34
720:8-56=34
90-56=34
34=34

Answer 2

720÷(5х-12)=34+56
720÷(5х-12)=90
5х-12=720÷90
5х-12=8
5х=12+8
5х=20
х=20÷5
х=4