Respuesta :

savannahkaye
29-3y, because 20+9, and 10y-7y :)
stanmat

Suppose you want to equate an expression to zero:

[tex]\[\begin{array}{l}20 - 10y - 7y + 9 = 0\\29 - 17y = 0\\17y = 29\\y = \frac{{29}}{{17}}\end{array}\][/tex]

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