4(3+a)=16

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Solution for 4(3+a)=16 equation: 


Simplifying
4(3 + a) = 16
(3 * 4 + a * 4) = 16
(12 + 4a) = 16

Solving
12 + 4a = 16

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 4a = 16 + -12

Combine like terms: 12 + -12 = 0
0 + 4a = 16 + -12
4a = 16 + -12

Combine like terms: 16 + -12 = 4
4a = 4

Divide each side by '4'.
a = 1

Simplifying
a = 1

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