Problema Solution
One number is 7 more than another. Twice the smaller added to the larger is -20. Find the smaller number.
Answer provided by our tutors
let 'x' and 'y' be the numbers and x be the smaller that is x < y
one number is 7 more than another
y = x + 7
twice the smaller added to the larger is -20
2x + y = - 20
by solving the system of equations
y = x + 7
2x + y = - 20
we find
x = - 9
y = -2
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the smaller number is -9.