9=2a-1

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Solution for 9=2a-1 equation:


Simplifying
9 = 2a + -1

Reorder the terms:
9 = -1 + 2a

Solving
9 = -1 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
9 + -2a = -1 + 2a + -2a

Combine like terms: 2a + -2a = 0
9 + -2a = -1 + 0
9 + -2a = -1

Add '-9' to each side of the equation.
9 + -9 + -2a = -1 + -9

Combine like terms: 9 + -9 = 0
0 + -2a = -1 + -9
-2a = -1 + -9

Combine like terms: -1 + -9 = -10
-2a = -10

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

Simplifying
a = 5

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