2x+3+5x-9+x+13+21-x=77

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Solution for 2x+3+5x-9+x+13+21-x=77 equation: 


Simplifying
2x + 3 + 5x + -9 + x + 13 + 21 + -1x = 77

Reorder the terms:
3 + -9 + 13 + 21 + 2x + 5x + x + -1x = 77

Combine like terms: 3 + -9 = -6
-6 + 13 + 21 + 2x + 5x + x + -1x = 77

Combine like terms: -6 + 13 = 7
7 + 21 + 2x + 5x + x + -1x = 77

Combine like terms: 7 + 21 = 28
28 + 2x + 5x + x + -1x = 77

Combine like terms: 2x + 5x = 7x
28 + 7x + x + -1x = 77

Combine like terms: 7x + x = 8x
28 + 8x + -1x = 77

Combine like terms: 8x + -1x = 7x
28 + 7x = 77

Solving
28 + 7x = 77

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 + 7x = 77 + -28

Combine like terms: 28 + -28 = 0
0 + 7x = 77 + -28
7x = 77 + -28

Combine like terms: 77 + -28 = 49
7x = 49

Divide each side by '7'.
x = 7

Simplifying
x = 7

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