75+30+x=405

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Solution for 75+30+x=405 equation: 


Simplifying
75 + 30 + x = 405

Combine like terms: 75 + 30 = 105
105 + x = 405

Solving
105 + x = 405

Solving for variable 'x'.

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

Add '-105' to each side of the equation.
105 + -105 + x = 405 + -105

Combine like terms: 105 + -105 = 0
0 + x = 405 + -105
x = 405 + -105

Combine like terms: 405 + -105 = 300
x = 300

Simplifying
x = 300

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