3[3a+(5a+7a)]-(5a+7a)=

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Solution for 3[3a+(5a+7a)]-(5a+7a)= equation: 


Simplifying
3[3a + (5a + 7a)] + -1(5a + 7a) = 0

Combine like terms: 5a + 7a = 12a
3[3a + (12a)] + -1(5a + 7a) = 0
3[3a + (12a)] + -1(5a + 7a) = 0

Combine like terms: 3a + (12a) = 15a
3[15a] + -1(5a + 7a) = 0

Remove brackets around [15a]
3 * 15a + -1(5a + 7a) = 0

Multiply 3 * 15
45a + -1(5a + 7a) = 0

Combine like terms: 5a + 7a = 12a
45a + -1(12a) = 0

Remove parenthesis around (12a)
45a + -1 * 12a = 0

Multiply -1 * 12
45a + -12a = 0

Combine like terms: 45a + -12a = 33a
33a = 0

Solving
33a = 0

Solving for variable 'a'.

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

Divide each side by '33'.
a = 0

Simplifying
a = 0

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