Question

решите уравнения

1) 3х-(8+9х)-(5х-4)=-7х
2)х-15.5+8х-(13х+16.5)=12х
3)6х-(2Х+13)-(Х-7)=15Х

Answer 1

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Answer 2

3х-(8+9х)-(5х-4)=-7х;
3х-8-9х+4=-7х
3х-9х-5х+7х=8-4
-4х=4
х=-1
х-15.5+8х-(13х+16.5)=12х
х-15.5+8х-13х-16.5=12х
х+8х-13х-12х=15.5+16.5
-16х=32
х=-2
6х-(2Х+13)-(Х-7)=15Х
6х-2х-13-х+7=15х
6х-2х-х-15х=13-7
12х-6
х=0.2