-19a-(-9a)-(-20a)+(-16a)=15

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Solution for -19a-(-9a)-(-20a)+(-16a)=15 equation:


Simplifying
-19a + -1(-9a) + -1(-20a) + (-16a) = 15

Remove parenthesis around (-9a)
-19a + -1 * -9a + -1(-20a) + (-16a) = 15

Multiply -1 * -9
-19a + 9a + -1(-20a) + (-16a) = 15

Remove parenthesis around (-20a)
-19a + 9a + -1 * -20a + (-16a) = 15

Multiply -1 * -20
-19a + 9a + 20a + (-16a) = 15

Combine like terms: -19a + 9a = -10a
-10a + 20a + (-16a) = 15

Combine like terms: -10a + 20a = 10a
10a + (-16a) = 15

Combine like terms: 10a + (-16a) = -6a
-6a = 15

Solving
-6a = 15

Solving for variable 'a'.

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

Divide each side by '-6'.
a = -2.5

Simplifying
a = -2.5

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