हल करना 1/3 - 1/18 + 1/21 | 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

$$\frac{1}{3}-\frac{1}{18}+\frac{1}{21}$$