Решить уравнение алгебраическим способом:
1) 3-4x=x-12
2) (x+7)-(3x+5)=2
3) 3(2x-1)+12=x
4) x+ x=7
3 4
1) 3-4x=x-12
2) (x+7)-(3x+5)=2
3) 3(2x-1)+12=x
4) x+ x=7
3 4
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Answers & Comments
-5х = -15
х = 3
2) (x+7)-(3x+5)=2
х + 7 - 3х - 5 = 2
-2х = 0
х = 0
3) 3(2x-1)+12=x
6х - 3 + 12 = х
5х = -9
х = -9/5 = -1,8
4) x+ x=7
2х = 7
х = 7/2 = 3,5