Question

решите уравнение:
1) 9x-4x+39=39
2)7x+2x-34=83

Answer 1

1)
9x-4x+39=39
9x-4x=39-39
5x=0
x=0

2)
7x+2x-34=83
7x+2x=34+83
9x=117
x=13

Answer 2

1)9х-4х=0
5х=0
Х=0
2)9х-34=83
9х=83+34
9х=117
Х=13