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OpenStudy (anonymous):
How many solutions does this system of equations have? y + 5x = -12 -20x - 4y = -12 Question 8 options: One Infinite number None
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jimthompson5910 (jim_thompson5910):
Notice that if you multiply equation by -4, you'll get -4(y+5x) = -4*(-12) -4y - 20x = 48 So we have the equations -20x-4y = 48 -20x-4y = -12 Add the equations to get -20x-4y = 48 -20x-4y = -12 -------------- 0x+0y = 36 0 = 36 ... which is a contradiction So there are no solutions
OpenStudy (anonymous):
o.k Thanks!!!
jimthompson5910 (jim_thompson5910):
You're welcome
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