21x+9+5x+56=15

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Solution for 21x+9+5x+56=15 equation:


Simplifying
21x + 9 + 5x + 56 = 15

Reorder the terms:
9 + 56 + 21x + 5x = 15

Combine like terms: 9 + 56 = 65
65 + 21x + 5x = 15

Combine like terms: 21x + 5x = 26x
65 + 26x = 15

Solving
65 + 26x = 15

Solving for variable 'x'.

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

Add '-65' to each side of the equation.
65 + -65 + 26x = 15 + -65

Combine like terms: 65 + -65 = 0
0 + 26x = 15 + -65
26x = 15 + -65

Combine like terms: 15 + -65 = -50
26x = -50

Divide each side by '26'.
x = -1.923076923

Simplifying
x = -1.923076923

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