3x+(x+40)=300

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Solution for 3x+(x+40)=300 equation:


Simplifying
3x + (x + 40) = 300

Reorder the terms:
3x + (40 + x) = 300

Remove parenthesis around (40 + x)
3x + 40 + x = 300

Reorder the terms:
40 + 3x + x = 300

Combine like terms: 3x + x = 4x
40 + 4x = 300

Solving
40 + 4x = 300

Solving for variable 'x'.

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

Add '-40' to each side of the equation.
40 + -40 + 4x = 300 + -40

Combine like terms: 40 + -40 = 0
0 + 4x = 300 + -40
4x = 300 + -40

Combine like terms: 300 + -40 = 260
4x = 260

Divide each side by '4'.
x = 65

Simplifying
x = 65

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