3+6x+7x=42

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Solution for 3+6x+7x=42 equation: 


Simplifying
3 + 6x + 7x = 42

Combine like terms: 6x + 7x = 13x
3 + 13x = 42

Solving
3 + 13x = 42

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 + 13x = 42 + -3

Combine like terms: 3 + -3 = 0
0 + 13x = 42 + -3
13x = 42 + -3

Combine like terms: 42 + -3 = 39
13x = 39

Divide each side by '13'.
x = 3

Simplifying
x = 3

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