Question 469866
y = −4x + 3
16x + 4y = 12 
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4x+y= 3
16x + 4y = 12 multiply first one by -4 and add to second one
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-16x-4y=-12
16x+4y=12   add them
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0=0 this is what you get when you add them, which means there's INFINITELY MANY soltuions