3(2a+7)-4a=

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Solution for 3(2a+7)-4a= equation:


Simplifying
3(2a + 7) + -4a = 0

Reorder the terms:
3(7 + 2a) + -4a = 0
(7 * 3 + 2a * 3) + -4a = 0
(21 + 6a) + -4a = 0

Combine like terms: 6a + -4a = 2a
21 + 2a = 0

Solving
21 + 2a = 0

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 + 2a = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 2a = 0 + -21
2a = 0 + -21

Combine like terms: 0 + -21 = -21
2a = -21

Divide each side by '2'.
a = -10.5

Simplifying
a = -10.5

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