Tìm x1/ 5.(4-x)-7.(-x+2)=4-9=32/ -3.(x-5)+6.(x+2)=93/ 4.x-5.(-3+x)=74/ 5.(x-3)-2.(x+6)=95/ 5.(x-7)+10.(3-x)=206/ -4.(x+1)+8.(x-3=247/ 7.(5-x) +5.(x-2)=158/ 4.(x-1)-3.(x-2)=-/-5/
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