3[2a+5(a-1)]-6=9

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Solution for 3[2a+5(a-1)]-6=9 equation:


Simplifying
3[2a + 5(a + -1)] + -6 = 9

Reorder the terms:
3[2a + 5(-1 + a)] + -6 = 9
3[2a + (-1 * 5 + a * 5)] + -6 = 9
3[2a + (-5 + 5a)] + -6 = 9

Reorder the terms:
3[-5 + 2a + 5a] + -6 = 9

Combine like terms: 2a + 5a = 7a
3[-5 + 7a] + -6 = 9
[-5 * 3 + 7a * 3] + -6 = 9
[-15 + 21a] + -6 = 9

Reorder the terms:
-15 + -6 + 21a = 9

Combine like terms: -15 + -6 = -21
-21 + 21a = 9

Solving
-21 + 21a = 9

Solving for variable 'a'.

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

Add '21' to each side of the equation.
-21 + 21 + 21a = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 21a = 9 + 21
21a = 9 + 21

Combine like terms: 9 + 21 = 30
21a = 30

Divide each side by '21'.
a = 1.428571429

Simplifying
a = 1.428571429

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