हल करना 0.19+0.21+0.20+0.21 | 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

$$0.19+0.21+0.20+0.21$$