Solve for x
x=4\sqrt{5}+351\approx 359.94427191
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4\sqrt{5}+7=x-4\left(-2+88\right)
Factor 80=4^{2}\times 5. Rewrite the square root of the product \sqrt{4^{2}\times 5} as the product of square roots \sqrt{4^{2}}\sqrt{5}. Take the square root of 4^{2}.
4\sqrt{5}+7=x-4\times 86
Add -2 and 88 to get 86.
4\sqrt{5}+7=x-344
Multiply 4 and 86 to get 344.
x-344=4\sqrt{5}+7
Swap sides so that all variable terms are on the left hand side.
x=4\sqrt{5}+7+344
Add 344 to both sides.
x=4\sqrt{5}+351
Add 7 and 344 to get 351.
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