x(7)=3*7*2-12*7-36

Solution for x(7)=3*7*2-12*7-36 equation:

Simplifying
x(7) = 3 * 7 * 2 + -12 * 7 + -36

Reorder the terms for easier multiplication:
7x = 3 * 7 * 2 + -12 * 7 + -36

Multiply 3 * 7
7x = 21 * 2 + -12 * 7 + -36

Multiply 21 * 2
7x = 42 + -12 * 7 + -36

Multiply -12 * 7
7x = 42 + -84 + -36

Combine like terms: 42 + -84 = -42
7x = -42 + -36

Combine like terms: -42 + -36 = -78
7x = -78

Solving
7x = -78

Solving for variable 'x'.

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

Divide each side by '7'.
x = -11.14285714

Simplifying
x = -11.14285714