3x+3=-5x-3x+5=-2(x-3)2y-1/3-2-y/2=-11/4(x+5)=1/7(x+1)-5/28
问题描述:
3x+3=-5x-3
x+5=-2(x-3)
2y-1/3-2-y/2=-1
1/4(x+5)=1/7(x+1)-5/28
答
3x+3=-5x-3
8x=-6
x=-0.75
答
①3x+3=-5x-3
3x+5x=-6
8x=-6
x=-3/4②x+5=-2(x-3)
x+5=-2x+6
x+2x=6-5
x=1/3③2y-1/3-2-y/2=-1
3y/2=-1+1/3+2
3y/2=4/3
y=-8/9④1/4(x+5)=1/7(x+1)-5/28
7(x+5)=4(x+1)-5
7x+35=4x+4-5
4x-3x=35+1
x=36
答
x=-3/4
x=1/3
y=8/9
x=-12