1+x+3x=45

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Solution for 1+x+3x=45 equation: 


Simplifying
1 + x + 3x = 45

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

Solving
1 + 4x = 45

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + 4x = 45 + -1

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

Combine like terms: 45 + -1 = 44
4x = 44

Divide each side by '4'.
x = 11

Simplifying
x = 11

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