2 years ago

One number is eight more than twice another. If their difference is 25, what is the larger number?

1 answer:

7 0

You can set up an system of equations
x=2y+8
x-y=25

Substitute x in to the second equation
2y+8-y=25
y+8=25
y=17

Substitute the y back in to the first equation.
x=2(17)+8=42

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