(7x+5)=(3x+21)

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


Simplifying
(7x + 5) = (3x + 21)

Reorder the terms:
(5 + 7x) = (3x + 21)

Remove parenthesis around (5 + 7x)
5 + 7x = (3x + 21)

Reorder the terms:
5 + 7x = (21 + 3x)

Remove parenthesis around (21 + 3x)
5 + 7x = 21 + 3x

Solving
5 + 7x = 21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
5 + 7x + -3x = 21 + 3x + -3x

Combine like terms: 7x + -3x = 4x
5 + 4x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
5 + 4x = 21 + 0
5 + 4x = 21

Add '-5' to each side of the equation.
5 + -5 + 4x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 4x = 21 + -5
4x = 21 + -5

Combine like terms: 21 + -5 = 16
4x = 16

Divide each side by '4'.
x = 4

Simplifying
x = 4

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