हल करना A / B = 7/5; B / C = 7/5; A / c = | 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

$$A:B=7:5; B:C=7:5; A:c=?$$