42=x+2x+4x

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Solution for 42=x+2x+4x equation:


Simplifying
42 = x + 2x + 4x

Combine like terms: x + 2x = 3x
42 = 3x + 4x

Combine like terms: 3x + 4x = 7x
42 = 7x

Solving
42 = 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
42 + -7x = 7x + -7x

Combine like terms: 7x + -7x = 0
42 + -7x = 0

Add '-42' to each side of the equation.
42 + -42 + -7x = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -7x = 0 + -42
-7x = 0 + -42

Combine like terms: 0 + -42 = -42
-7x = -42

Divide each side by '-7'.
x = 6

Simplifying
x = 6

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