Resolver 73 - [72 + \{(87 - 9) - (69 + 9)\}] | 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

$$73-[72+\{(87-9)-(69+9)\}]$$