-9a=-7a^2-2

Solution for -9a=-7a^2-2 equation:

Simplifying
-9a = -7a2 + -2

Reorder the terms:
-9a = -2 + -7a2

Solving
-9a = -2 + -7a2

Solving for variable 'a'.

Reorder the terms:
2 + -9a + 7a2 = -2 + -7a2 + 2 + 7a2

Reorder the terms:
2 + -9a + 7a2 = -2 + 2 + -7a2 + 7a2

Combine like terms: -2 + 2 = 0
2 + -9a + 7a2 = 0 + -7a2 + 7a2
2 + -9a + 7a2 = -7a2 + 7a2

Combine like terms: -7a2 + 7a2 = 0
2 + -9a + 7a2 = 0

Factor a trinomial.
(2 + -7a)(1 + -1a) = 0

Subproblem 1
Set the factor '(2 + -7a)' equal to zero and attempt to solve:

Simplifying
2 + -7a = 0

Solving
2 + -7a = 0

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

Add '-2' to each side of the equation.
2 + -2 + -7a = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -7a = 0 + -2
-7a = 0 + -2

Combine like terms: 0 + -2 = -2
-7a = -2

Divide each side by '-7'.
a = 0.2857142857

Simplifying
a = 0.2857142857
Subproblem 2
Set the factor '(1 + -1a)' equal to zero and attempt to solve:

Simplifying
1 + -1a = 0

Solving
1 + -1a = 0

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

Add '-1' to each side of the equation.
1 + -1 + -1a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1a = 0 + -1
-1a = 0 + -1

Combine like terms: 0 + -1 = -1
-1a = -1

Divide each side by '-1'.
a = 1

Simplifying
a = 1
Solution
a = {0.2857142857, 1}