Solve for x
x=12
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x-5=\frac{21}{3}
Divide 15 by 3 to get 5.
x-5=7
Divide 21 by 3 to get 7.
x=7+5
Add 5 to both sides.
x=12
Add 7 and 5 to get 12.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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