1) 4(х+3) = 164х + 12 = 164х = 16 - 124х = 4x = 1
2) 10(1+х) = 4010 + 10х = 4010х = 40 - 1010х = 30x = 3
3) 2(х-4) = 112х - 8 = 112х = 11 + 82х = 19x = 9.5
4) 5(3-x) = 4515 - 5x = 45-5x = 30x = -6
Ответ: x = 1, x = 3, x = 9.5, x = -6.
1) 4(х+3) = 16
4х + 12 = 16
4х = 16 - 12
4х = 4
x = 1
2) 10(1+х) = 40
10 + 10х = 40
10х = 40 - 10
10х = 30
x = 3
3) 2(х-4) = 11
2х - 8 = 11
2х = 11 + 8
2х = 19
x = 9.5
4) 5(3-x) = 45
15 - 5x = 45
-5x = 30
x = -6
Ответ: x = 1, x = 3, x = 9.5, x = -6.