Example

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

Question

$$2.1 \frac { 5 x } { 3 y } - 4 = \frac { 2 x } { 5 } , 2 x - 7$$

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