Question

1.5(3x + 1,2) + x = 6,8
2.0,4b +3=0,2(3b + 1)-b
3.6(x-1)= 9,4 - 1,7x
4.3,5-9a2(0,5a-4)
5.3(2,4-1,1m) = 2,7m + 3,2
6.3(x-1)=2(2-x) + 6 ​

Answer 1

4 не знаю________________