हल करना nd commutative prop ( b) - 2/7 and - 1/9 | 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

$$\frac { - 2 } { 7 } - \frac { 1 } { 9 }$$