What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = ½

group of answer choices

the student did not multiply all terms by the common denominator

the student found an incorrect common denominator

the student did not use opposite operations appropriately

the student did not correctly eliminate the variable from one side of the equation