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Alisiya [41]
3 years ago
13

The sum of two numbers is 87. if three times the smaller number is subtracted from the larger number the result is seven. find t

he two numbers
Mathematics
1 answer:
Stolb23 [73]3 years ago
5 0
\left \{ {{a+b=87} \atop {a-3b=7}} \right.



a-3b=7
a=7+3b

a+b=87
(7+3b)+b=87
7+4b=87
4b=87-7
4b=80
b=20

a=7+3b
a=7+3*20
a=7+60
a=67
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