Solve for x
x=-7
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-3x-4+\sqrt{9}=\sqrt{400}
Combine -5x and 2x to get -3x.
-3x-4+3=\sqrt{400}
Calculate the square root of 9 and get 3.
-3x-1=\sqrt{400}
Add -4 and 3 to get -1.
-3x-1=20
Calculate the square root of 400 and get 20.
-3x=20+1
Add 1 to both sides.
-3x=21
Add 20 and 1 to get 21.
x=\frac{21}{-3}
Divide both sides by -3.
x=-7
Divide 21 by -3 to get -7.
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