4-2(5a-10)=30

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Solution for 4-2(5a-10)=30 equation:


Simplifying
4 + -2(5a + -10) = 30

Reorder the terms:
4 + -2(-10 + 5a) = 30
4 + (-10 * -2 + 5a * -2) = 30
4 + (20 + -10a) = 30

Combine like terms: 4 + 20 = 24
24 + -10a = 30

Solving
24 + -10a = 30

Solving for variable 'a'.

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

Add '-24' to each side of the equation.
24 + -24 + -10a = 30 + -24

Combine like terms: 24 + -24 = 0
0 + -10a = 30 + -24
-10a = 30 + -24

Combine like terms: 30 + -24 = 6
-10a = 6

Divide each side by '-10'.
a = -0.6

Simplifying
a = -0.6

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