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phuongnguyen332000
2 năm trước
tim x ∈ z biet 1.x-2=-6 2.-5x-(-3)=13 3.15-(x-7)=-21 4.3x+17=2 5.45-(x-9)=-35 6.(-5)+x=15 7.2x-(-17)=15 8.(x-2)=3 9.(x-3)-7=13 10.17-(43-|x|)=45 12.3|x-1|-5=7
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