4(x+3)-15=21

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Solution for 4(x+3)-15=21 equation:


Simplifying
4(x + 3) + -15 = 21

Reorder the terms:
4(3 + x) + -15 = 21
(3 * 4 + x * 4) + -15 = 21
(12 + 4x) + -15 = 21

Reorder the terms:
12 + -15 + 4x = 21

Combine like terms: 12 + -15 = -3
-3 + 4x = 21

Solving
-3 + 4x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 4x = 21 + 3

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

Combine like terms: 21 + 3 = 24
4x = 24

Divide each side by '4'.
x = 6

Simplifying
x = 6

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