On an algebra test, the highest grade was 50 points higher than the lowest grade. The sum of the two grades was 122. Find the lowest grade.

Answer 1

x + (x + 50) = 122

x + x = 122 - 50

x + x = 72

2x = 72

2 . 2

x = 36

Lowest grade is a 36 and highest grade is an 86.