а)15-(6х-3)=5-7х
15-6х+3=5-7х
-6х+7х=5-3-15
х=-13.
б) 10-2х=х-(2-4х)
10-2х=х-2+4х
-2х-4х-х=-2-10
-7х=-12
х=12/7 (дробь)
х= 1 целая 5/7 (дробь)
а) 15-(6x-3)=5-7x
15-6x+3=5-7x
-6x+7x=5-15-3
x=-13
б) 10-2x=x-(2-4x)
10-2x=x-2+4x
-2x-x-4x=-2-10
-7x=-12
x= 12/7
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Answers & Comments
а)15-(6х-3)=5-7х
15-6х+3=5-7х
-6х+7х=5-3-15
х=-13.
б) 10-2х=х-(2-4х)
10-2х=х-2+4х
-2х-4х-х=-2-10
-7х=-12
х=12/7 (дробь)
х= 1 целая 5/7 (дробь)
а) 15-(6x-3)=5-7x
15-6x+3=5-7x
-6x+7x=5-15-3
x=-13
б) 10-2x=x-(2-4x)
10-2x=x-2+4x
-2x-x-4x=-2-10
-7x=-12
x= 12/7