x-3.5×0.8=7.2列方程,
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x-3.5×0.8=7.2列方程,x-3.5×0.8=7.2列方程,x-3.5×0.8=7.2列方程,x-3.5×0.8=7.2x-2.8=7.2x=2.8+7.2x=1010X-2.=7.2X=9.
x-3.5×0.8=7.2列方程,
x-3.5×0.8=7.2列方程,
x-3.5×0.8=7.2列方程,
x-3.5×0.8=7.2
x-2.8=7.2
x=2.8+7.2
x=10
10
X-2.=7.2
X=9.2
7.48
x-3.5*0.8=7.2
x-2.8=7.2
x=2.8+7.2
x=10