Tìm x biết: 2.(x.5) - 3.(x + 7) = 14

Tìm x biết:
a.2.(x.5)-3.(x+7)=14
b.5.(x-6)-2.(x+3)=12
c.-7.(5-x)-2.(x-10)=15
d.3.(x-4)-(8-x)=12
e.4.(x-5)-(x+7)=-19
f.7.(x-3)-5.(3-x)=11x-5