Resolver - 9 - (- 7 + (- 4 + 18/6) - 7) + 15 | 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

$$-9-(-7+(-4+18\div6)-7)+15$$