如何解方程X-30%X=4.9

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如何解方程X-30%X=4.9如何解方程X-30%X=4.9如何解方程X-30%X=4.9X-30%X=4.90.7X=4.9X=4.9/0.7X=7X-30%X=4.9(1-30%)X=4.9(10

如何解方程X-30%X=4.9
如何解方程X-30%X=4.9

如何解方程X-30%X=4.9
X-30%X=4.9
0.7X=4.9
X=4.9/0.7
X=7

X-30%X=4.9
(1-30%)X=4.9
(100%-30%)X=4.9
70%X=4.9
0.7X=4.9
X=7

X-30%X=4.9
70%X=4.9
X=4.9/70%
X=7