A first number plus twice a second number is 13 twice the first number plus the second totals 20 find the numbers

Question

Mathematics

Adam Hoover

5 March, 07:42

A first number plus twice a second number is 13 twice the first number plus the second totals 20 find the numbers

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Answers (1)

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Coco Chanel · Answer 1

Call the first number A and the second number B.

A + 2B = 13

2A + B = 20

Solve these equations. You will get the equation

3B = 6. Therefore, B = 2.

Put this into either of the equations to find that A = 9. You can then check by putting A = 9 and B = 2 into both the equations to see if it is true. In this case, it is. Therefore, the solution is A = 9, B = 2.

A = 9, B = 2.