7.2x-x=77.5 怎么解
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7.2x-x=77.5怎么解7.2x-x=77.5怎么解7.2x-x=77.5怎么解6.2x=77.5x=77.5/6.2x=12.57.2x-x=77.56.2x=77.5x=12.57.2x-x=
7.2x-x=77.5 怎么解
7.2x-x=77.5 怎么解
7.2x-x=77.5 怎么解
6.2x=77.5
x=77.5/6.2
x=12.5
7.2x-x=77.5
6.2x=77.5
x=12.5
7.2x-x=77.5
6.2x=77.5
x=12.5
先算带有未知数X的,
(7.2-1)*X=77.5
6.2*X=77.5 两边同时除以6.2
X=12.5
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