Solve for k
k=-21x
Solve for x
x=-\frac{k}{21}
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-24x-3x\left(-15\right)+k=0
Multiply 4 and -6 to get -24.
-24x-\left(-45x\right)+k=0
Multiply 3 and -15 to get -45.
-24x+45x+k=0
The opposite of -45x is 45x.
21x+k=0
Combine -24x and 45x to get 21x.
k=-21x
Subtract 21x from both sides. Anything subtracted from zero gives its negation.
-24x-3x\left(-15\right)+k=0
Multiply 4 and -6 to get -24.
-24x-\left(-45x\right)+k=0
Multiply 3 and -15 to get -45.
-24x+45x+k=0
The opposite of -45x is 45x.
21x+k=0
Combine -24x and 45x to get 21x.
21x=-k
Subtract k from both sides. Anything subtracted from zero gives its negation.
\frac{21x}{21}=-\frac{k}{21}
Divide both sides by 21.
x=-\frac{k}{21}
Dividing by 21 undoes the multiplication by 21.
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