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OpenStudy (anonymous):
How can x + 8 = −x + 7 be set up as a system of equations?
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OpenStudy (anonymous):
x+8=? -x+7=? Obsiously the first and second problem are the same, so you can say: -x+7=x+8 or (-8)-(-x)= x-(-7). Does this help you? http://www.purplemath.com/modules/systlin4.htm hopefully this site will help
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