हल करना (4)/(3)-(5)/(7)+(2)/(21) | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$\frac{ 4 }{ 3 } - \frac{ 5 }{ 7 } + \frac{ 2 }{ 21 }$$