问题
解答题
求未知数
126÷x=42
19×6-2x=28.
答案
126÷x=42
126×
×x=42x1 x
42x=126
x=3;
②19×6-2x=28
114-2x+2x=28+2x
2x+28-28=114-28
2x=92
2x÷2=92÷2
x=46.
求未知数
126÷x=42
19×6-2x=28.
126÷x=42
126×
×x=42x1 x
42x=126
x=3;
②19×6-2x=28
114-2x+2x=28+2x
2x+28-28=114-28
2x=92
2x÷2=92÷2
x=46.