а)72-11x=43+18x
– 11x – 18x = 43 – 72
-29x = -29
x = 1
б)2(x+1)-3=11
2x + 2 – 3 = 11
2x = 11 + 3 – 2
2x = 12
x = 6
в)3(1+2x)=75
3 + 6x = 75
6x = 75 – 3
6x = 72
x = 12
г)3(ч-1)+2=17
3ч – 3 + 2 = 17
3ч = 17 – 2 + 3
3ч = 18
ч = 6
а)72-11x=43+18x
– 11x – 18x = 43 – 72
-29x = -29
x = 1
б)2(x+1)-3=11
2x + 2 – 3 = 11
2x = 11 + 3 – 2
2x = 12
x = 6
в)3(1+2x)=75
3 + 6x = 75
6x = 75 – 3
6x = 72
x = 12
г)3(ч-1)+2=17
3ч – 3 + 2 = 17
3ч = 17 – 2 + 3
3ч = 18
ч = 6