10x+20=180
10x=160
x=16
[tex]7x + 5 = 9y \\ 7(16) + 5 = 9y \\ 117 = 9y \\ y = 13[/tex]
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10x+20=180
10x=160
x=16
[tex]7x + 5 = 9y \\ 7(16) + 5 = 9y \\ 117 = 9y \\ y = 13[/tex]