Answer:
8.7
Explanation:
y + 8.5 = 17.2
combine the like terms
y = 17.2-8.5
y=8.7
verify
8.7+8.5=17.2
17.2=17.2
y =8.7
Subtract 8.5 from each side
y +8.5-8.5 = 17.2 -8.5
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