Tìm x, 4(x-5) - 7.(5-x) + 10(5-x) = -3, 7x + 6(3-x) = 27 - 20 + 73, |x+8| + 5(x-2) = 5.x - 10:2

Tìm x biết :
a)4(x-5) - 7.(5-x)+10(5-x)=-3
b)7x+6(3-x)=27-20+73
c)|x+8|+5(x-2)=5.x-10:2