21=2(4ax+2)

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Solution for 21=2(4ax+2) equation:


Simplifying
21 = 2(4ax + 2)

Reorder the terms:
21 = 2(2 + 4ax)
21 = (2 * 2 + 4ax * 2)
21 = (4 + 8ax)

Solving
21 = 4 + 8ax

Solving for variable 'a'.

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

Add '-8ax' to each side of the equation.
21 + -8ax = 4 + 8ax + -8ax

Combine like terms: 8ax + -8ax = 0
21 + -8ax = 4 + 0
21 + -8ax = 4

Add '-21' to each side of the equation.
21 + -21 + -8ax = 4 + -21

Combine like terms: 21 + -21 = 0
0 + -8ax = 4 + -21
-8ax = 4 + -21

Combine like terms: 4 + -21 = -17
-8ax = -17

Divide each side by '-8x'.
a = 2.125x-1

Simplifying
a = 2.125x-1

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