3+3+3+3+x+x+x+x=28

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Solution for 3+3+3+3+x+x+x+x=28 equation: 


Simplifying
3 + 3 + 3 + 3 + x + x + x + x = 28

Combine like terms: 3 + 3 = 6
6 + 3 + 3 + x + x + x + x = 28

Combine like terms: 6 + 3 = 9
9 + 3 + x + x + x + x = 28

Combine like terms: 9 + 3 = 12
12 + x + x + x + x = 28

Combine like terms: x + x = 2x
12 + 2x + x + x = 28

Combine like terms: 2x + x = 3x
12 + 3x + x = 28

Combine like terms: 3x + x = 4x
12 + 4x = 28

Solving
12 + 4x = 28

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 4x = 28 + -12

Combine like terms: 12 + -12 = 0
0 + 4x = 28 + -12
4x = 28 + -12

Combine like terms: 28 + -12 = 16
4x = 16

Divide each side by '4'.
x = 4

Simplifying
x = 4

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