Resolver 8 . 8/21 + 5/21 + 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

$$\frac { 8 } { 21 } + \frac { 5 } { 21 } + \frac { 2 } { 21 } =$$