X-30%X=91 (解方程,)

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X-30%X=91(解方程,)X-30%X=91(解方程,)X-30%X=91(解方程,)X-30%X=91x-0.3x=910.7x=91x=91÷0.7x=130X-30%X=91解(1-30%)

X-30%X=91 (解方程,)
X-30%X=91 (解方程,)

X-30%X=91 (解方程,)
X-30%X=91
x-0.3x=91
0.7x=91
x=91÷0.7
x=130

X-30%X=91

(1-30%)x=91
0.7x=91
x=91÷0..7
x=130
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(1-0.3)X=91
0.7X=91
X=130

x-30%=91
70%x=91
x=130