7a-2=2(a+9)

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


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

Reorder the terms:
-2 + 7a = 2(a + 9)

Reorder the terms:
-2 + 7a = 2(9 + a)
-2 + 7a = (9 * 2 + a * 2)
-2 + 7a = (18 + 2a)

Solving
-2 + 7a = 18 + 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.
-2 + 7a + -2a = 18 + 2a + -2a

Combine like terms: 7a + -2a = 5a
-2 + 5a = 18 + 2a + -2a

Combine like terms: 2a + -2a = 0
-2 + 5a = 18 + 0
-2 + 5a = 18

Add '2' to each side of the equation.
-2 + 2 + 5a = 18 + 2

Combine like terms: -2 + 2 = 0
0 + 5a = 18 + 2
5a = 18 + 2

Combine like terms: 18 + 2 = 20
5a = 20

Divide each side by '5'.
a = 4

Simplifying
a = 4

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