А) 4(х+3) = 5(х-2)
4х+12 = 5х - 10
4х - 5х = -10 - 12
-х = -22 | : (-1)
х = 22
б) -2(х-5) + 3(х-4) = 4х+1
-2х +10 + 3х - 12 = 4х +1
-2х + 3х - 4х = 1 +12 - 10
-3х = 3 | :(-3)
х = 1
в) 3(х-1) = 2(х+2)
3х-3 = 2х+4
3х - 2х = 4 +3
х = 7
г) 3(х-5) - 2(х+4) = -5х +1
3х - 15 - 2х - 8 = -5х +1
3х - 2х + 5х = 1 +8 + 15
6х = 24 | : 6
х = 4