7*X^2-15=5

Solution for 7*X^2-15=5 equation:

Simplifying
7X2 + -15 = 5

Reorder the terms:
-15 + 7X2 = 5

Solving
-15 + 7X2 = 5

Solving for variable 'X'.

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

Add '15' to each side of the equation.
-15 + 15 + 7X2 = 5 + 15

Combine like terms: -15 + 15 = 0
0 + 7X2 = 5 + 15
7X2 = 5 + 15

Combine like terms: 5 + 15 = 20
7X2 = 20

Divide each side by '7'.
X2 = 2.857142857

Simplifying
X2 = 2.857142857

Take the square root of each side:
X = {-1.690308509, 1.690308509}