Menyelesaikan J=(B-()((5)/(7)))-(()((12)/(21))-A) | Equatix - Math Solver

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3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$J=(B- \frac { 5 } { 7 } )-( \frac { 12 } { 21 } -A)$$