c*a+d*b=

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Solution for c*a+d*b= equation: 


Simplifying
c * a + d * b = 0

Multiply c * a
ac + d * b = 0

Multiply d * b
ac + bd = 0

Solving
ac + bd = 0

Solving for variable 'a'.

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

Add '-1bd' to each side of the equation.
ac + bd + -1bd = 0 + -1bd

Combine like terms: bd + -1bd = 0
ac + 0 = 0 + -1bd
ac = 0 + -1bd
Remove the zero:
ac = -1bd

Divide each side by 'c'.
a = -1bc-1d

Simplifying
a = -1bc-1d

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