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Sagot :
[tex]10x+5y=80 \\ \\ (10x+5y)-10x=(80)-10x \\ \\ 5y=-10x+80 \\ \\ \frac{5y}{5}= \frac{-10x+80}{5} \\ \\ y=-2x+16[/tex]
Write the original equation - 10x + 5y = 80
Subtract 10x from each side - 10x + 5y - 10x = 80 - 10x
Simplify - 5y = 80 - 10x
Divide each side by 5 - [tex]\frac{5y}{5}[/tex] = [tex]\frac{80 - 10x}{5}[/tex]
Simplify - Y = 16 - 2x
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