13. Divide 42 into two parts such that twice the first part added to thrice the second
part gives 114.
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Step-by-step explanation:
- A.t.q.
- 2x+3y=114 .......eq. 1
- (x+y=42)×2
- 2x+2y=84 .........eq.2
- from 1 and 2
- 2x+3y-2x-2y=114-84
- y=30
- x+30=42
- x=12
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