a^2+16a-1-a^2-7a+19=

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Solution for a^2+16a-1-a^2-7a+19= equation:


Simplifying
a2 + 16a + -1 + -1a2 + -7a + 19 = 0

Reorder the terms:
-1 + 19 + 16a + -7a + a2 + -1a2 = 0

Combine like terms: -1 + 19 = 18
18 + 16a + -7a + a2 + -1a2 = 0

Combine like terms: 16a + -7a = 9a
18 + 9a + a2 + -1a2 = 0

Combine like terms: a2 + -1a2 = 0
18 + 9a + 0 = 0
18 + 9a = 0

Solving
18 + 9a = 0

Solving for variable 'a'.

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

Add '-18' to each side of the equation.
18 + -18 + 9a = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 9a = 0 + -18
9a = 0 + -18

Combine like terms: 0 + -18 = -18
9a = -18

Divide each side by '9'.
a = -2

Simplifying
a = -2

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