Example

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

Question

$$\frac{x}{y}=\frac{5}{2}; 3x^{2}+5y^{2}; 3x^{2}-5y^{2}$$

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