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OpenStudy (anonymous):
Solve the following system of equations for c: c + 6d = 31/2 d = 9 – 2c
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OpenStudy (anonymous):
multiply 1st equation by 2 to get rid of the fractions 2c+12d=31 plug in d 2c+12(9-2c)=31 2c+81-24c=31 22c=50 c=50/22 =25/11
OpenStudy (anonymous):
Ohhh, thank you c:
OpenStudy (anonymous):
Wait. Wouldn't 12 times 9 be 108, not 81?
OpenStudy (anonymous):
yes you are right, I can't seem to multiply.
OpenStudy (anonymous):
Hah, it's okay. Thanks though!
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