Question

$$\left. \begin{array} { l } { - 4 ( - 25 } \\ { - 4 ( - 25 + 4 ) = 105 - 12 } \end{array} \right.$$

Answer

S=-4629/2

Solution


Expand.
\[-4625+8S-16=10S-12\]
Simplify  \(-4625+8S-16\)  to  \(8S-4641\).
\[8S-4641=10S-12\]
Subtract \(8S\) from both sides.
\[-4641=10S-12-8S\]
Simplify  \(10S-12-8S\)  to  \(2S-12\).
\[-4641=2S-12\]
Add \(12\) to both sides.
\[-4641+12=2S\]
Simplify  \(-4641+12\)  to  \(-4629\).
\[-4629=2S\]
Divide both sides by \(2\).
\[-\frac{4629}{2}=S\]
Switch sides.
\[S=-\frac{4629}{2}\]

Decimal Form: -2314.5