Tìm x

1) 2(1/4-3x)=1/5-4x

2) 5/2 - 3(1/3-x)=1/4-7x

3) 4(1/3-x)+1/2=5/6+x

4) 3(1/2-x)-5(x-1/10)=-7/4

5) 1/2(4/5-3/2)+x=5(x-1/10)

6) 4(3/4+x)-1/5=7x-1/7

giúp mjk nhá