40=7x^2

Solution for 40=7x^2 equation:

Simplifying
40 = 7x2

Solving
40 = 7x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-7x2' to each side of the equation.
40 + -7x2 = 7x2 + -7x2

Combine like terms: 7x2 + -7x2 = 0
40 + -7x2 = 0

Add '-40' to each side of the equation.
40 + -40 + -7x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -7x2 = 0 + -40
-7x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-7x2 = -40

Divide each side by '-7'.
x2 = 5.714285714

Simplifying
x2 = 5.714285714

Take the square root of each side:
x = {-2.390457219, 2.390457219}