(1)2x+3-2(x+5)=x (2)2(2x-1)-(x-3)=1 (3)8x-2(1-x)=7x-3(x-1) (4)2(10-0.5y)=-(1.5y-2)要有每一步的过程.
问题描述:
(1)2x+3-2(x+5)=x (2)2(2x-1)-(x-3)=1 (3)8x-2(1-x)=7x-3(x-1) (4)2(10-0.5y)=-(1.5y-2)
要有每一步的过程.
答
(1)2x+3-2(x+5)=x (2)2(2x-1)-(x-3)=1 (3)8x-2(1-x)=7x-3(x-1)2x+3-2x-10=x 4x-2-x+3=1 10x-2=4x+3-7=x x=0 x=5/6(4)2(10-0.5y)=-(1.5y-2)20-y=-1.5y+20.5y=-18y=-36