7+2(1a-3)=9

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Solution for 7+2(1a-3)=9 equation:


Simplifying
7 + 2(1a + -3) = 9

Reorder the terms:
7 + 2(-3 + 1a) = 9
7 + (-3 * 2 + 1a * 2) = 9
7 + (-6 + 2a) = 9

Combine like terms: 7 + -6 = 1
1 + 2a = 9

Solving
1 + 2a = 9

Solving for variable 'a'.

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

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

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

Combine like terms: 9 + -1 = 8
2a = 8

Divide each side by '2'.
a = 4

Simplifying
a = 4

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