Example

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

Question

$$3 + 1 \frac { 1 } { 5 } - 2 \frac { 1 } { 3 } + 2 \frac { 1 } { 5 } =$$

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