Asked by Anita

The sum of two numbers is 21 .two-thirds of one number is added to three-quarters of the other number to give 15 .find the two numbers,showing clearly your workings.
Answered by Reiny
simple translation from English to Math (after all Math is just a language)

let 1st number be x
let 2nd number be y

x + y = 21

(2/3)x + (3/4)y = 15
multiply each term by 12
8x + 9y = 180

I would use substitution,
from the 1st equation ----> y = 21-x
sub that into the 2nd

go for it, just a few more steps
Answered by Anita
are u sure it is substitution or simultaneous equation
Answered by Mariam
Substitution method
Answered by Kate
Wrong equation
Answered by Kate
Substitution wrong
Answered by Ishaq
Maths
Answered by Sammy bosky
more explanation should be given
Answered by Anonymous
The sim of two numbers is 21.3/4 of one of the number added to 2/3 of the other gives a sum of 15.find The two number
Answered by Anonymous
I have not my answer
Answered by Kosi
Wrong answer
Answered by Tunmise
More explanation
Answered by Vitalis mabel
6 years ago
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