3a-4+5a+7+2[a+1]=

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Solution for 3a-4+5a+7+2[a+1]= equation:


Simplifying
3a + -4 + 5a + 7 + 2[a + 1] = 0

Reorder the terms:
3a + -4 + 5a + 7 + 2[1 + a] = 0
3a + -4 + 5a + 7 + [1 * 2 + a * 2] = 0
3a + -4 + 5a + 7 + [2 + 2a] = 0

Reorder the terms:
-4 + 7 + 2 + 3a + 5a + 2a = 0

Combine like terms: -4 + 7 = 3
3 + 2 + 3a + 5a + 2a = 0

Combine like terms: 3 + 2 = 5
5 + 3a + 5a + 2a = 0

Combine like terms: 3a + 5a = 8a
5 + 8a + 2a = 0

Combine like terms: 8a + 2a = 10a
5 + 10a = 0

Solving
5 + 10a = 0

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + 10a = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 10a = 0 + -5
10a = 0 + -5

Combine like terms: 0 + -5 = -5
10a = -5

Divide each side by '10'.
a = -0.5

Simplifying
a = -0.5

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