CPM Homework Help : PC3 Problem 2-89

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2-89.

Algebraically solve each system of equations and state the method you used. Check your answer graphically.

$4y-5x=-2$
$x-2y=-8$
Hint (a):
Rewrite the first equation so that it is in standard form. Then multiply the second equation by $5$ .
Step (a):
$−5x+4y=−2$
$5x−10y=−16$

$y=-\frac{3}{4}x+9$
$2x-y=2$
Step (b):
$2x-\Big(-\frac{3}{4}x+9\Big)=2$

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