3(x-21)+3(x-2)=39

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Solution for 3(x-21)+3(x-2)=39 equation: 


Simplifying
3(x + -21) + 3(x + -2) = 39

Reorder the terms:
3(-21 + x) + 3(x + -2) = 39
(-21 * 3 + x * 3) + 3(x + -2) = 39
(-63 + 3x) + 3(x + -2) = 39

Reorder the terms:
-63 + 3x + 3(-2 + x) = 39
-63 + 3x + (-2 * 3 + x * 3) = 39
-63 + 3x + (-6 + 3x) = 39

Reorder the terms:
-63 + -6 + 3x + 3x = 39

Combine like terms: -63 + -6 = -69
-69 + 3x + 3x = 39

Combine like terms: 3x + 3x = 6x
-69 + 6x = 39

Solving
-69 + 6x = 39

Solving for variable 'x'.

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

Add '69' to each side of the equation.
-69 + 69 + 6x = 39 + 69

Combine like terms: -69 + 69 = 0
0 + 6x = 39 + 69
6x = 39 + 69

Combine like terms: 39 + 69 = 108
6x = 108

Divide each side by '6'.
x = 18

Simplifying
x = 18

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