Resolver 5/7 + 7/14 + 8/21 | 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

$$\frac{5}{7}+\frac{7}{14}+\frac{8}{21}$$