How do you solve x+ 3= - 11- xx+3=−11−x?

1 Answer
seol
Nov 19, 2016

x=-7x=−7

Explanation:

x+3=-11-xx+3=−11−x
Add xx to both sides \rArrx+3\color(olive)(+x)=-11\cancel(-x)\cancel(\color(olive)(+x))
Subtract 3 from both sides rArr2x\cancel(+3)\cancel(\color(indianred)(-3))=-11\color(indianred)(-3)
Simplify rArr2x=\color(mediumaquamarine)(-14)
Divide both sides by 2 rArr(\cancel(2)x)/\cancel(\color(seagreen)(2))=-14/\color(seagreen)(2)
x=-7

plug in to check:
\color(red)(-7)+3\stackrel{?}{=}-11-(\color(red)(-7))
-4=-4

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