x*7x+x*7x=15

Solution for x*7x+x*7x=15 equation:

Simplifying
x * 7x + x * 7x = 15

Reorder the terms for easier multiplication:
7x * x + x * 7x = 15

Multiply x * x
7x2 + x * 7x = 15

Reorder the terms for easier multiplication:
7x2 + 7x * x = 15

Multiply x * x
7x2 + 7x2 = 15

Combine like terms: 7x2 + 7x2 = 14x2
14x2 = 15

Solving
14x2 = 15

Solving for variable 'x'.

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

Divide each side by '14'.
x2 = 1.071428571

Simplifying
x2 = 1.071428571

Take the square root of each side:
x = {-1.035098339, 1.035098339}