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 = 1
1 + 3a + 5a + 2a = 0

Combine like terms: 3a + 5a = 8a
1 + 8a + 2a = 0

Combine like terms: 8a + 2a = 10a
1 + 10a = 0

Solving
1 + 10a = 0

Solving for variable 'a'.

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

Add '-1' to each side of the equation.
1 + -1 + 10a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 10a = 0 + -1
10a = 0 + -1

Combine like terms: 0 + -1 = -1
10a = -1

Divide each side by '10'.
a = -0.1

Simplifying
a = -0.1

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