a+4a+(5a-7)=180

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Solution for a+4a+(5a-7)=180 equation:


Simplifying
a + 4a + (5a + -7) = 180

Reorder the terms:
a + 4a + (-7 + 5a) = 180

Remove parenthesis around (-7 + 5a)
a + 4a + -7 + 5a = 180

Reorder the terms:
-7 + a + 4a + 5a = 180

Combine like terms: a + 4a = 5a
-7 + 5a + 5a = 180

Combine like terms: 5a + 5a = 10a
-7 + 10a = 180

Solving
-7 + 10a = 180

Solving for variable 'a'.

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

Add '7' to each side of the equation.
-7 + 7 + 10a = 180 + 7

Combine like terms: -7 + 7 = 0
0 + 10a = 180 + 7
10a = 180 + 7

Combine like terms: 180 + 7 = 187
10a = 187

Divide each side by '10'.
a = 18.7

Simplifying
a = 18.7

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