A(4)=12+(4-1)(3)

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Solution for A(4)=12+(4-1)(3) equation: 


Simplifying
A(4) = 12 + (4 + -1)(3)

Reorder the terms for easier multiplication:
4A = 12 + (4 + -1)(3)

Combine like terms: 4 + -1 = 3
4A = 12 + (3)(3)

Multiply 3 * 3
4A = 12 + 9

Combine like terms: 12 + 9 = 21
4A = 21

Solving
4A = 21

Solving for variable 'A'.

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

Divide each side by '4'.
A = 5.25

Simplifying
A = 5.25

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