Example

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

Question

$$\frac { 2.5 \times 2.5 + 2 \times 3.75 + 1.5 \times 1.5 } { 2.5 + 1.5 }$$

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