xa-xb=c

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Solution for xa-xb=c equation: 


Simplifying
xa + -1xb = c

Solving
ax + -1bx = c

Solving for variable 'a'.

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

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

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

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

Simplifying
a = b + cx-1

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