2a+10-4a-20=0

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Solution for 2a+10-4a-20=0 equation:


Simplifying
2a + 10 + -4a + -20 = 0

Reorder the terms:
10 + -20 + 2a + -4a = 0

Combine like terms: 10 + -20 = -10
-10 + 2a + -4a = 0

Combine like terms: 2a + -4a = -2a
-10 + -2a = 0

Solving
-10 + -2a = 0

Solving for variable 'a'.

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

Add '10' to each side of the equation.
-10 + 10 + -2a = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -2a = 0 + 10
-2a = 0 + 10

Combine like terms: 0 + 10 = 10
-2a = 10

Divide each side by '-2'.
a = -5

Simplifying
a = -5

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