bài 1:tìm x thuộc z biết:
1.10.(x-7)-8.(x+5)=6(-5)+24
2.8.(x-|-7)-6(x-2)=|-8|.6-50
3.2(4x-8)-7(3+x)=|-4|.(3-2)
4.12.(x-4)+6.(x-2)-16.(x+3)=7|-4|
5.4(x-5)-7(5-x)+10(5-x)=-3
6.3|x-3|=15-|-9|+7-|-3|-(-24)
7.6|x-3|-9|x-3|=-21
8.-3|x-5|=15(-3) + 7(-3)
9.4|x-7|-3(-5)=-2|x-7|-10
10.|x+8|=-2(-7)(-3)-2(-40