2x(a+b)=420

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Solution for 2x(a+b)=420 equation: 


Simplifying
2x(a + b) = 420
(a * 2x + b * 2x) = 420
(2ax + 2bx) = 420

Solving
2ax + 2bx = 420

Solving for variable 'a'.

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

Add '-2bx' to each side of the equation.
2ax + 2bx + -2bx = 420 + -2bx

Combine like terms: 2bx + -2bx = 0
2ax + 0 = 420 + -2bx
2ax = 420 + -2bx

Divide each side by '2x'.
a = 210x-1 + -1b

Simplifying
a = 210x-1 + -1b

Reorder the terms:
a = -1b + 210x-1

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