12=4x+3(3x+19)

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Solution for 12=4x+3(3x+19) equation:


Simplifying
12 = 4x + 3(3x + 19)

Reorder the terms:
12 = 4x + 3(19 + 3x)
12 = 4x + (19 * 3 + 3x * 3)
12 = 4x + (57 + 9x)

Reorder the terms:
12 = 57 + 4x + 9x

Combine like terms: 4x + 9x = 13x
12 = 57 + 13x

Solving
12 = 57 + 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.
12 + -13x = 57 + 13x + -13x

Combine like terms: 13x + -13x = 0
12 + -13x = 57 + 0
12 + -13x = 57

Add '-12' to each side of the equation.
12 + -12 + -13x = 57 + -12

Combine like terms: 12 + -12 = 0
0 + -13x = 57 + -12
-13x = 57 + -12

Combine like terms: 57 + -12 = 45
-13x = 45

Divide each side by '-13'.
x = -3.461538462

Simplifying
x = -3.461538462

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