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SOVA2 [1]
3 years ago
13

Solve system by elimination -16x-9y=20 8x+2y=0

Mathematics
1 answer:
sladkih [1.3K]3 years ago
5 0
\left \{ {{-16x-9y=20} \atop {8x+2y=0\ \ | *2}} \right. \\\\  \left \{ {{-16x-9y=20} \atop {16x+4y=0}} \right. \\+------\\\\
-5y=20\ \ \ | divide\ by\ -5\\\\
y=-4\\\\
16x=-4y\ \ \ | divide\ by\ 16\\\\
x=-\frac{1}{4}y=-\frac{1}{4}*(-4)=1
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