Problema Solution
the sum of two numbers is 90. their difference is 18. find the numbers
Answer provided by our tutors
let 'x' and 'y' be the numbers
the sum of two numbers is 90
x + y = 90
their difference is 18
x - y = 18
by solving the system of equations
x + y = 90
x - y = 18
we find
x = 54
y = 36
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