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Can you solve a math problem: x+y=42, x-y=30?

asked 2020-09-01 04:05:51 -0500

baokhang2002 gravatar image

In page 43, math problem 1, on Math 4 Workbook, Part One, Vietnamese Education Publishing House:
The sum of mother and son's ages is 42. The mother is 30 years older than her son. How old is the mother and her son?

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Try something like:

sage: var('x,y');
sage: solve([x + y == 42, x - y == 30], [x, y])
[[x == 36, y == 6]]

(Or just ignore sage code, and use plain thoughts or simple drawings.)

dan_fulea gravatar imagedan_fulea ( 2020-09-04 18:01:26 -0500 )edit

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answered 2020-09-01 04:37:38 -0500

tmonteil gravatar image

updated 2020-09-01 04:38:12 -0500

Sage is able to solve such systems of equations, you can have a look at the tutorial :

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Asked: 2020-09-01 04:05:51 -0500

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Last updated: Sep 01