x(x*.07)=742.69

Solution for x(x*.07)=742.69 equation:

Simplifying
x(x * 0.07) = 742.69

Reorder the terms for easier multiplication:
x(0.07x) = 742.69

Remove parenthesis around (0.07x)
x * 0.07x = 742.69

Reorder the terms for easier multiplication:
0.07x * x = 742.69

Multiply x * x
0.07x2 = 742.69

Solving
0.07x2 = 742.69

Solving for variable 'x'.

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

Divide each side by '0.07'.
x2 = 10609.85714

Simplifying
x2 = 10609.85714

Take the square root of each side:
x = {-103.00416079, 103.00416079}