Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$-\frac{8x}{100}+\frac{20000-x}{75}=800; \frac{6x}{75}+\frac{20000-x}{75}=800$$

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