a+4(a-2)=-1

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Solution for a+4(a-2)=-1 equation: 


Simplifying
a + 4(a + -2) = -1

Reorder the terms:
a + 4(-2 + a) = -1
a + (-2 * 4 + a * 4) = -1
a + (-8 + 4a) = -1

Reorder the terms:
-8 + a + 4a = -1

Combine like terms: a + 4a = 5a
-8 + 5a = -1

Solving
-8 + 5a = -1

Solving for variable 'a'.

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

Add '8' to each side of the equation.
-8 + 8 + 5a = -1 + 8

Combine like terms: -8 + 8 = 0
0 + 5a = -1 + 8
5a = -1 + 8

Combine like terms: -1 + 8 = 7
5a = 7

Divide each side by '5'.
a = 1.4

Simplifying
a = 1.4

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