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\sqrt{29+20}=23-x\times 5
Multiply 4 and 5 to get 20.
\sqrt{49}=23-x\times 5
Add 29 and 20 to get 49.
7=23-x\times 5
Calculate the square root of 49 and get 7.
23-x\times 5=7
Swap sides so that all variable terms are on the left hand side.
23-5x=7
Multiply -1 and 5 to get -5.
-5x=7-23
Subtract 23 from both sides.
-5x=-16
Subtract 23 from 7 to get -16.
x=\frac{-16}{-5}
Divide both sides by -5.
x=\frac{16}{5}
Fraction \frac{-16}{-5} can be simplified to \frac{16}{5} by removing the negative sign from both the numerator and the denominator.