3-[2a+7]=3a+12

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Solution for 3-[2a+7]=3a+12 equation:


Simplifying
3 + -1[2a + 7] = 3a + 12

Reorder the terms:
3 + -1[7 + 2a] = 3a + 12
3 + [7 * -1 + 2a * -1] = 3a + 12
3 + [-7 + -2a] = 3a + 12

Combine like terms: 3 + -7 = -4
-4 + -2a = 3a + 12

Reorder the terms:
-4 + -2a = 12 + 3a

Solving
-4 + -2a = 12 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-4 + -2a + -3a = 12 + 3a + -3a

Combine like terms: -2a + -3a = -5a
-4 + -5a = 12 + 3a + -3a

Combine like terms: 3a + -3a = 0
-4 + -5a = 12 + 0
-4 + -5a = 12

Add '4' to each side of the equation.
-4 + 4 + -5a = 12 + 4

Combine like terms: -4 + 4 = 0
0 + -5a = 12 + 4
-5a = 12 + 4

Combine like terms: 12 + 4 = 16
-5a = 16

Divide each side by '-5'.
a = -3.2

Simplifying
a = -3.2

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