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A first number plus twice a second number is 24. twice the first number plus the second totals 21. find the numbers.
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A first number plus twice a second number is 24. twice the first number plus the second totals 21. find the numbers.

User Ajpolt
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1 Answer

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We do like the following:
Set the first number is a and the second is b.
We have two equations: a+2xb=24, 2xa+b=21
And we have 2xa+4xb=48 or 2xa=48-4xb
So: 48-4xb+b=21 or -3xb=21-48=-27 and we got b=-27:(-3)=9 and a= 6
a=6 and b=9
User Fabien Kruba
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