Question

Evaluate 1/4r + 7/12 when r = 7/12

Answer 1

`(35)/(48)`

Explanation:

Put the value of r in the equation.

`(1)/(4)` × r +
`(7)/(12)` =
`(1)/(4)` ×
`(7)/(12)` +
`(7)/(12)`

Evaluate.

`(1)/(4)` ×
`(7)/(12)` +
`(7)/(12)` =
`(7)/(48)` +
`(7)/(12)`

Make them have the same denominator by multiplying the denominator of the second fraction by 4 so their denominators are 48.

`(7)/(48)` +
`(7)/(12)` =
`(7)/(48)` +
`(28)/(48)`

Evaluate.

`(7)/(48)` +
`(28)/(48)` =
`(35)/(48)`