Tìm x

tìm x(5)
2×(x-5)-3(x+7)=14
5×(x-6)-2×(x+3)÷12
-7×(5-x)-2×(x-10)=15
3(x-4)-(8-x)=12
4×(x-5)-(x+7)=-19
7×(x-3)-5×(3-x)=11x-5