Solve 100=5*20-x*20^2

$$100=5 \times 20-x \times { 20 }^{ 2 }$$

Solve for x

$$x=0$$

Steps for Solving Linear Equation

Multiply 5 and 20 to get 100.

$$100=100-x\times 20^{2}$$

Calculate 20 to the power of 2 and get 400.

$$100=100-x\times 400$$

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

$$100-x\times 400=100$$

Multiply -1 and 400 to get -400.

$$100-400x=100$$

Subtract 100 from both sides.

$$-400x=100-100$$

Subtract 100 from 100 to get 0.

$$-400x=0$$

Product of two numbers is equal to 0 if at least one of them is 0. Since -400 is not equal to 0, x must be equal to 0.

$$x=0$$