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OpenStudy (anonymous):
solve the equation 13x - 28 = 9x + 56
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OpenStudy (lgbasallote):
subtract 9x from both sides...what do you get?
OpenStudy (anonymous):
19
OpenStudy (epikrebel):
The answer is not 19.
OpenStudy (anonymous):
28 - 9 is 19
OpenStudy (epikrebel):
You combine or subtract like terms. \[13x(-9x)-28(+28)=9x(-9x)+56(+28)\]
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OpenStudy (epikrebel):
\[4x=84\] \[\frac{ 4x }{ 4 }=\frac{84}{4}\] x=21
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