利用等式的性质解下列方程. (1)y+3=2; (2)-1/2y-2=3; (3)9x=8x-6; (4)8m=4m+1.

问题描述:

利用等式的性质解下列方程.
(1)y+3=2;       (2)-

1
2
y-2=3;
(3)9x=8x-6;     (4)8m=4m+1.

(1)y+3-3=2-3,
y=-1;
(2)-

1
2
y-2+2=3+2,
-
1
2
y=5,
y=-10;
(3)9x-8x=8x-6-8x,
x=-6;
(4)8m-4m=4m+1-4m,
4m=1,
m=
1
4