15x+20-10-9=25x+8-21x-7

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Solution for 15x+20-10-9=25x+8-21x-7 equation:


Simplifying
15x + 20 + -10 + -9 = 25x + 8 + -21x + -7

Reorder the terms:
20 + -10 + -9 + 15x = 25x + 8 + -21x + -7

Combine like terms: 20 + -10 = 10
10 + -9 + 15x = 25x + 8 + -21x + -7

Combine like terms: 10 + -9 = 1
1 + 15x = 25x + 8 + -21x + -7

Reorder the terms:
1 + 15x = 8 + -7 + 25x + -21x

Combine like terms: 8 + -7 = 1
1 + 15x = 1 + 25x + -21x

Combine like terms: 25x + -21x = 4x
1 + 15x = 1 + 4x

Add '-1' to each side of the equation.
1 + -1 + 15x = 1 + -1 + 4x

Combine like terms: 1 + -1 = 0
0 + 15x = 1 + -1 + 4x
15x = 1 + -1 + 4x

Combine like terms: 1 + -1 = 0
15x = 0 + 4x
15x = 4x

Solving
15x = 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
15x + -4x = 4x + -4x

Combine like terms: 15x + -4x = 11x
11x = 4x + -4x

Combine like terms: 4x + -4x = 0
11x = 0

Divide each side by '11'.
x = 0

Simplifying
x = 0

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