Question

On an algebra test ,the highest grade was 42 points higher than the lowest grade. The sum of the two grades was 138 find the lowest grade

Answer 1

`lowest = x \\ highest = x + 42`

`2x + 42 = 138`

`138 - 42`

`2x = 96`

`2x / 2x \\ 96 / 2`

`x = 48`

`48 + 42 = 90`
the lowest grade is 48, while the highest is 90.