17х + 18х = 700
35x = 700
x = 700 : 35
x = 20
39х + 33х = 432
72x = 432
x = 432 : 72
x = 6
17x+18x=700
35x=700
X=20
39x+33x=432
72x=432
x=6
17х + 18х = 700
35x = 700
x = 700 : 35
x = 20
39х + 33х = 432
72x = 432
x = 432 : 72
x = 6
17x+18x=700
35x=700
X=20
39x+33x=432
72x=432
x=6