Question

What is the sum of `y/3` and `(4y)/9` when `y=7`?

Answer 1

5`\frac {4} {9}` or `\frac {49} {9}`

Explanation:

So first you make the fractions `\frac {y} {3}` and `\frac {4y} {9}` have equal denominators. You do this by multiplying the denominator and numerator by 3 for the fraction `\frac {y} {3}`. This gives you `\frac {3y} {9}`. Then you add `\frac {3y} {9}` and `\frac {4y} {9}` together to get `\frac {7y} {9}`. Finally, you substitute 7 for `y` to get `\frac {7*7} {9}`. This gives you `\frac {49} {9}` or putting into mixed fraction gives you 5`\frac {4} {9}`.