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

2 tìm x
a -2(-x+3)-4(2x-5)=-(4x+3)-2(1-4x)
b -(6x+5)+2(-x+4)=2(4-x)-5(-x+4)