[8*(7-a)]+4=28

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Solution for [8*(7-a)]+4=28 equation:


Simplifying
[8(7 + -1a)] + 4 = 28
[(7 * 8 + -1a * 8)] + 4 = 28
[(56 + -8a)] + 4 = 28
[56 + -8a] + 4 = 28

Remove brackets around [56 + -8a]
56 + -8a + 4 = 28

Reorder the terms:
56 + 4 + -8a = 28

Combine like terms: 56 + 4 = 60
60 + -8a = 28

Solving
60 + -8a = 28

Solving for variable 'a'.

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

Add '-60' to each side of the equation.
60 + -60 + -8a = 28 + -60

Combine like terms: 60 + -60 = 0
0 + -8a = 28 + -60
-8a = 28 + -60

Combine like terms: 28 + -60 = -32
-8a = -32

Divide each side by '-8'.
a = 4

Simplifying
a = 4

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