9a-b+4(2a-a)=

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Solution for 9a-b+4(2a-a)= equation:


Simplifying
9a + -1b + 4(2a + -1a) = 0

Combine like terms: 2a + -1a = 1a
9a + -1b + 4(1a) = 0

Remove parenthesis around (1a)
9a + -1b + 4 * 1a = 0

Multiply 4 * 1
9a + -1b + 4a = 0

Reorder the terms:
9a + 4a + -1b = 0

Combine like terms: 9a + 4a = 13a
13a + -1b = 0

Solving
13a + -1b = 0

Solving for variable 'a'.

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

Add 'b' to each side of the equation.
13a + -1b + b = 0 + b

Combine like terms: -1b + b = 0
13a + 0 = 0 + b
13a = 0 + b
Remove the zero:
13a = b

Divide each side by '13'.
a = 0.07692307692b

Simplifying
a = 0.07692307692b

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