1) 8х+12=5х+3
8x – 5x = 3 – 12
3x = -9
x = -3
2) 3(2х+1)+7=4
6x + 3 + 7 = 4
6x = 4 – 7 – 3
6x = -6
x = -1
3) 6+3(5х-7)=4х+7
6 + 15x – 21 = 4x + 7
15x – 4x = 7 + 21 – 6
11x = 22
x = 2
4) 3(7х-4)-4(6х+5)=х
21x – 12 – 24x – 20 = 1x
21x – 24x – x = 20 + 12
-4x = 32
x = -8
5) 3х-5(2х+3)-6(5х-4)=-28
3x – 10x – 15 – 30x + 24 = – 28
3x – 10x – 30x = – 28 – 24 + 15
-37x = -37
x = 1
6) 3(х+21)+2(х-4)=5(х+11)
3x + 63 + 2x – 8 = 5x + 55
3x + 2x – 5x = 55 + 8 – 63
Уравнение имеет множество решений
1) 8х+12=5х+3
8x – 5x = 3 – 12
3x = -9
x = -3
2) 3(2х+1)+7=4
6x + 3 + 7 = 4
6x = 4 – 7 – 3
6x = -6
x = -1
3) 6+3(5х-7)=4х+7
6 + 15x – 21 = 4x + 7
15x – 4x = 7 + 21 – 6
11x = 22
x = 2
4) 3(7х-4)-4(6х+5)=х
21x – 12 – 24x – 20 = 1x
21x – 24x – x = 20 + 12
-4x = 32
x = -8
5) 3х-5(2х+3)-6(5х-4)=-28
3x – 10x – 15 – 30x + 24 = – 28
3x – 10x – 30x = – 28 – 24 + 15
-37x = -37
x = 1
6) 3(х+21)+2(х-4)=5(х+11)
3x + 63 + 2x – 8 = 5x + 55
3x + 2x – 5x = 55 + 8 – 63
Уравнение имеет множество решений