Реши уравнение:
1) 15 - 3x = 3 - 7x
2) 9x = 7 + 4(3x -1)
3) 6x - 5 = 3(7x - 4) + 7
4) 29 - 6(3x - 4) = 5(4x + 3)
5) 5x - 4(6 - 7x) - 3(4x + 3) =2
6) -4,3(x - 3) + 0,8 = -3,5x + 10
1) 15 - 3x = 3 - 7x
2) 9x = 7 + 4(3x -1)
3) 6x - 5 = 3(7x - 4) + 7
4) 29 - 6(3x - 4) = 5(4x + 3)
5) 5x - 4(6 - 7x) - 3(4x + 3) =2
6) -4,3(x - 3) + 0,8 = -3,5x + 10
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Answers & Comments
-3x+7=-12
4x=-12
X=-3
4х=-12
х=-3
2). 9х=7+12х-4
9х-12х=7-4
-3х=3
х=-1
3) 6х-21х=-12+5+7
-15х=0
х=0
4) 29-18х +24=20х+15
-38х=-38
х=1
5) 5х-24+28х-12х-9=2
21х=35
х= 2 1:5 ( две целых одна третья)
6) -4.3х+12.9+0.8=-3.5х+10
-4.3х+3.5х=10-12.9-0.8
-0.8х=-3.7
х= 4.625