X+3X=28,怎么算了?忘了
问题描述：
X+3X=28,怎么算了?忘了
答
x+3x=28
1x+3x=28
4x=28
x=28除以4
x=7
答
（1+3）X=28
4x =28
x =28*4
x =7
答
解 x+3x=28
4x=28
x=28÷4
x=7
答
X+3X=28
4X=28
X=28÷4
X=7
答
X+3X=28
4x=28
x=7
答
4X=28
X=28/4=7
答
x=7