2a(21)=420

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Solution for 2a(21)=420 equation: 


Simplifying
2a(21) = 420

Reorder the terms for easier multiplication:
2 * 21a = 420

Multiply 2 * 21
42a = 420

Solving
42a = 420

Solving for variable 'a'.

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

Divide each side by '42'.
a = 10

Simplifying
a = 10

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