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