Solve pi(2.5)^2/4*x*0.129=7

$$\frac { \pi ( 2.5 ) ^ { 2 } } { 4 } \times x \times 0.129 = 7$$

Solve for x

$$x = \frac{4480}{129 \pi} \approx 11.054482869$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 4.

$$\pi \times 2.5^{2}x\times 0.129=28$$

Calculate 2.5 to the power of 2 and get 6.25.

$$\pi \times 6.25x\times 0.129=28$$

Multiply 6.25 and 0.129 to get 0.80625.

$$\pi \times 0.80625x=28$$

The equation is in standard form.

$$\frac{129\pi }{160}x=28$$

Divide both sides by 0.80625\pi .

$$\frac{160\times \frac{129\pi }{160}x}{129\pi }=\frac{28\times 160}{129\pi }$$

Dividing by 0.80625\pi undoes the multiplication by 0.80625\pi .

$$x=\frac{28\times 160}{129\pi }$$

Divide 28 by 0.80625\pi .

$$x=\frac{4480}{129\pi }$$