21=3(2+3x)+4x

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Solution for 21=3(2+3x)+4x equation:


Simplifying
21 = 3(2 + 3x) + 4x
21 = (2 * 3 + 3x * 3) + 4x
21 = (6 + 9x) + 4x

Combine like terms: 9x + 4x = 13x
21 = 6 + 13x

Solving
21 = 6 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
21 + -13x = 6 + 13x + -13x

Combine like terms: 13x + -13x = 0
21 + -13x = 6 + 0
21 + -13x = 6

Add '-21' to each side of the equation.
21 + -21 + -13x = 6 + -21

Combine like terms: 21 + -21 = 0
0 + -13x = 6 + -21
-13x = 6 + -21

Combine like terms: 6 + -21 = -15
-13x = -15

Divide each side by '-13'.
x = 1.153846154

Simplifying
x = 1.153846154

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