2a+5a*4a-a=

Solution for 2a+5a*4a-a= equation:

Simplifying
2a + 5a * 4a + -1a = 0

Reorder the terms for easier multiplication:
2a + 5 * 4a * a + -1a = 0

Multiply 5 * 4
2a + 20a * a + -1a = 0

Multiply a * a
2a + 20a2 + -1a = 0

Reorder the terms:
2a + -1a + 20a2 = 0

Combine like terms: 2a + -1a = 1a
1a + 20a2 = 0

Solving
1a + 20a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), 'a'.
a(1 + 20a) = 0

Subproblem 1
Set the factor 'a' equal to zero and attempt to solve:

Simplifying
a = 0

Solving
a = 0

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

Simplifying
a = 0
Subproblem 2
Set the factor '(1 + 20a)' equal to zero and attempt to solve:

Simplifying
1 + 20a = 0

Solving
1 + 20a = 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 + 20a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 20a = 0 + -1
20a = 0 + -1

Combine like terms: 0 + -1 = -1
20a = -1

Divide each side by '20'.
a = -0.05

Simplifying
a = -0.05
Solution
a = {0, -0.05}