4 ( х + 1 ) = 15х - 7 ( 2х + 5 )
4х + 4 * 1 = 15х - 7 * 2х + 7 * 5
4х + 4 = 15х - 14х + 35
4х + 4 = 1х - 35
4х + 4 = х - 35
4х - х = - 35 - 4
3х = - 39
х = - 39 : 3
х = - 13
1)28,48
2)24,58
3)7,105
4)10,180
5)18,50
1)121,44
2)7,28
3)9,36
4)36,1296