Solve 411pi=pi*12.9*x+pi*12.9^2

$$411 \pi = \pi \times 12.9 \times x+ \pi \times { 12.9 }^{ 2 }$$

Solve for x

$$x = \frac{8153}{430} = 18\frac{413}{430} \approx 18.960465116$$

Steps for Solving Linear Equation

Calculate 12.9 to the power of 2 and get 166.41.

$$411\pi =\pi \times 12.9x+\pi \times 166.41$$

Swap sides so that all variable terms are on the left hand side.

$$\pi \times 12.9x+\pi \times 166.41=411\pi$$

Subtract \pi \times 166.41 from both sides.

$$\pi \times 12.9x=411\pi -\pi \times 166.41$$

Combine 411\pi and -\pi \times 166.41 to get 244.59\pi .

$$\pi \times 12.9x=244.59\pi$$

Cancel out \pi on both sides.

$$12.9x=244.59$$

Divide both sides by 12.9.

$$x=\frac{244.59}{12.9}$$

Expand \frac{244.59}{12.9} by multiplying both numerator and the denominator by 100.

$$x=\frac{24459}{1290}$$

Reduce the fraction \frac{24459}{1290} to lowest terms by extracting and canceling out 3.

$$x=\frac{8153}{430}$$