Answer:
15-5y=20
15-20=5y
-5=5y
y=-1
1
Step-by-step explanation:
[tex]swap \: - 5y \: and \: 15[/tex]
working step:
[tex]
15+−5y=20 \\
−5y+15=20 \\
−5y+15−15=20−15 \\
−5y=5 \\
−5y−5=5−5 \\
y=−1
[/tex]
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