25b-(b-5)=29.7x+2(3x-3)=25b-(b-5)=29.7x+2(3x-3)=20.8y-3(3y+2)=6
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![25b-(b-5)=29.7x+2(3x-3)=25b-(b-5)=29.7x+2(3x-3)=20.8y-3(3y+2)=6](/uploads/image/z/2547273-57-3.jpg?t=25b%EF%BC%8D%EF%BC%88b%EF%BC%8D5%EF%BC%89%EF%BC%9D29.7x%2B2%EF%BC%883x-3%EF%BC%89%EF%BC%9D25b%EF%BC%8D%EF%BC%88b%EF%BC%8D5%EF%BC%89%EF%BC%9D29.7x%2B2%EF%BC%883x-3%EF%BC%89%EF%BC%9D20.8y-3%EF%BC%883y%2B2%29%3D6)
25b-(b-5)=29.7x+2(3x-3)=25b-(b-5)=29.7x+2(3x-3)=20.8y-3(3y+2)=6
25b-(b-5)=29.7x+2(3x-3)=
25b-(b-5)=29.7x+2(3x-3)=20.8y-3(3y+2)=6
25b-(b-5)=29.7x+2(3x-3)=25b-(b-5)=29.7x+2(3x-3)=20.8y-3(3y+2)=6
1)5a+(2-4a)=0
5a-4a=-2
a=-2
(2)25b-(b-5)=29
25b-b=29-5
24b=24
b=1
(3)7x+2(3x-3)=20
7x+6x=20+6
13x=26
x=2
(4)8y-3(3y+2)=6
8y-9y=6+6
-y=12
y=-12