Ответы и объяснения

2013-10-27T15:56:55+04:00
4х+12=5х-10
4х-5х=-10-12
-х=-22
х=22

-2х+10+3х-12=4х+1
-2x + 10 + 3x - 12 = 4x + 1
3x = -3
x = -1

3(x-1)=2(x+2)
3x- 3  = 2x + 4
x = 7

3(x-5)-2(x+4)=-5x+1

3x - 15 - 2x - 8 = -5x + 1
6x = 24
x = 4




2013-10-27T15:57:29+04:00
4(x+3)=5(x-2)
4x + 12 = 5x - 10
x = 22

-2(x-5)+3(x-4)=4x+1
-2x + 10 + 3x - 12 = 4x + 1
3x = -3
x = -1

3(x-1)=2(x+2)
3x- 3  = 2x + 4
x = 7

3(x-5)-2(x+4)=-5x+1

3x - 15 - 2x - 8 = -5x + 1
6x = 24
x = 4