((5x)-(3x))2=(7x)-21

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Solution for ((5x)-(3x))2=(7x)-21 equation:


Simplifying
((5x) + -1(3x)) * 2 = (7x) + -21

Remove parenthesis around (3x)
((5x) + -1 * 3x) * 2 = (7x) + -21

Multiply -1 * 3
((5x) + -3x) * 2 = (7x) + -21

Combine like terms: (5x) + -3x = 2x
(2x) * 2 = (7x) + -21

Remove parenthesis around (2x)
2x * 2 = (7x) + -21

Reorder the terms for easier multiplication:
2 * 2x = (7x) + -21

Multiply 2 * 2
4x = (7x) + -21

Reorder the terms:
4x = -21 + (7x)

Solving
4x = -21 + (7x)

Solving for variable 'x'.

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

Add '(-7x)' to each side of the equation.
4x + (-7x) = -21 + (7x) + (-7x)

Combine like terms: 4x + (-7x) = -3x
-3x = -21 + (7x) + (-7x)

Combine like terms: (7x) + (-7x) = 0
-3x = -21 + 0
-3x = -21

Divide each side by '-3'.
x = 7

Simplifying
x = 7

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