Question

MA=3y-2
HT=2y+4
LV=8.5

identified error
correction of error
explanation of error

$lv =\frac{1}{2} \\ 8.5 = \frac{1}{2} (3y + 2) + (2y + 4) \\ 8.5 = \frac{1}{2} (5y + 2) \\ 16 = (5y + 2) \\ 15 = 5y \\ 3 = y$
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Answer 1

First answer is right u can follow that step