3x+28=40

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Solution for 3x+28=40 equation: 


Simplifying
3x + 28 = 40

Reorder the terms:
28 + 3x = 40

Solving
28 + 3x = 40

Solving for variable 'x'.

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

Add '-28' to each side of the equation.
28 + -28 + 3x = 40 + -28

Combine like terms: 28 + -28 = 0
0 + 3x = 40 + -28
3x = 40 + -28

Combine like terms: 40 + -28 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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