Answer:
y = 20
Explanation:
25=2y - 15
2y - 15 = 25
2y - 15 + 15 = 25 + 15
2y = 40
2y ÷ 2 = 40 ÷ 2
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2(20) - 15 = 25
40 - 15 = 25
25 = 25
y=20
25+15=40
2y=40
40/2=20
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