7(a-7)+9=2(a-5)

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Solution for 7(a-7)+9=2(a-5) equation:


Simplifying
7(a + -7) + 9 = 2(a + -5)

Reorder the terms:
7(-7 + a) + 9 = 2(a + -5)
(-7 * 7 + a * 7) + 9 = 2(a + -5)
(-49 + 7a) + 9 = 2(a + -5)

Reorder the terms:
-49 + 9 + 7a = 2(a + -5)

Combine like terms: -49 + 9 = -40
-40 + 7a = 2(a + -5)

Reorder the terms:
-40 + 7a = 2(-5 + a)
-40 + 7a = (-5 * 2 + a * 2)
-40 + 7a = (-10 + 2a)

Solving
-40 + 7a = -10 + 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.
-40 + 7a + -2a = -10 + 2a + -2a

Combine like terms: 7a + -2a = 5a
-40 + 5a = -10 + 2a + -2a

Combine like terms: 2a + -2a = 0
-40 + 5a = -10 + 0
-40 + 5a = -10

Add '40' to each side of the equation.
-40 + 40 + 5a = -10 + 40

Combine like terms: -40 + 40 = 0
0 + 5a = -10 + 40
5a = -10 + 40

Combine like terms: -10 + 40 = 30
5a = 30

Divide each side by '5'.
a = 6

Simplifying
a = 6

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