4a+5a=10a-20

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Solution for 4a+5a=10a-20 equation: 


Simplifying
4a + 5a = 10a + -20

Combine like terms: 4a + 5a = 9a
9a = 10a + -20

Reorder the terms:
9a = -20 + 10a

Solving
9a = -20 + 10a

Solving for variable 'a'.

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

Add '-10a' to each side of the equation.
9a + -10a = -20 + 10a + -10a

Combine like terms: 9a + -10a = -1a
-1a = -20 + 10a + -10a

Combine like terms: 10a + -10a = 0
-1a = -20 + 0
-1a = -20

Divide each side by '-1'.
a = 20

Simplifying
a = 20

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