7=9-5a

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Solution for 7=9-5a equation:


Simplifying
7 = 9 + -5a

Solving
7 = 9 + -5a

Solving for variable 'a'.

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

Add '5a' to each side of the equation.
7 + 5a = 9 + -5a + 5a

Combine like terms: -5a + 5a = 0
7 + 5a = 9 + 0
7 + 5a = 9

Add '-7' to each side of the equation.
7 + -7 + 5a = 9 + -7

Combine like terms: 7 + -7 = 0
0 + 5a = 9 + -7
5a = 9 + -7

Combine like terms: 9 + -7 = 2
5a = 2

Divide each side by '5'.
a = 0.4

Simplifying
a = 0.4

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