xa+xb=20

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Solution for xa+xb=20 equation: 


Simplifying
xa + xb = 20

Solving
ax + bx = 20

Solving for variable 'a'.

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

Add '-1bx' to each side of the equation.
ax + bx + -1bx = 20 + -1bx

Combine like terms: bx + -1bx = 0
ax + 0 = 20 + -1bx
ax = 20 + -1bx

Divide each side by 'x'.
a = 20x-1 + -1b

Simplifying
a = 20x-1 + -1b

Reorder the terms:
a = -1b + 20x-1

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