x*2-7*2-9-21=0

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Solution for x*2-7*2-9-21=0 equation:


Simplifying
x * 2 + -7 * 2 + -9 + -21 = 0

Reorder the terms for easier multiplication:
2x + -7 * 2 + -9 + -21 = 0

Multiply -7 * 2
2x + -14 + -9 + -21 = 0

Reorder the terms:
-14 + -9 + -21 + 2x = 0

Combine like terms: -14 + -9 = -23
-23 + -21 + 2x = 0

Combine like terms: -23 + -21 = -44
-44 + 2x = 0

Solving
-44 + 2x = 0

Solving for variable 'x'.

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

Add '44' to each side of the equation.
-44 + 44 + 2x = 0 + 44

Combine like terms: -44 + 44 = 0
0 + 2x = 0 + 44
2x = 0 + 44

Combine like terms: 0 + 44 = 44
2x = 44

Divide each side by '2'.
x = 22

Simplifying
x = 22

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