Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$x2+6x-40=0$$

Answer

x=5

Solution


Regroup terms.
\[2x+6x-40=0\]
Simplify  \(2x+6x-40\)  to  \(8x-40\).
\[8x-40=0\]
Add \(40\) to both sides.
\[8x=40\]
Divide both sides by \(8\).
\[x=\frac{40}{8}\]
Simplify  \(\frac{40}{8}\)  to  \(5\).
\[x=5\]
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