3(a+5)-8=28

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Solution for 3(a+5)-8=28 equation:


Simplifying
3(a + 5) + -8 = 28

Reorder the terms:
3(5 + a) + -8 = 28
(5 * 3 + a * 3) + -8 = 28
(15 + 3a) + -8 = 28

Reorder the terms:
15 + -8 + 3a = 28

Combine like terms: 15 + -8 = 7
7 + 3a = 28

Solving
7 + 3a = 28

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + 3a = 28 + -7

Combine like terms: 7 + -7 = 0
0 + 3a = 28 + -7
3a = 28 + -7

Combine like terms: 28 + -7 = 21
3a = 21

Divide each side by '3'.
a = 7

Simplifying
a = 7

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