3x=45+4x

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Solution for 3x=45+4x equation: 


Simplifying
3x = 45 + 4x

Solving
3x = 45 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
3x + -4x = 45 + 4x + -4x

Combine like terms: 3x + -4x = -1x
-1x = 45 + 4x + -4x

Combine like terms: 4x + -4x = 0
-1x = 45 + 0
-1x = 45

Divide each side by '-1'.
x = -45

Simplifying
x = -45

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