a*5-9a*3+6a*2-20=a*4+11*3-a*2.

Solution for a*5-9a*3+6a*2-20=a*4+11*3-a*2. equation:

a*5-9a*3+6a*2-20=a*4+11*3-a*2.

We move all terms to the left:

a*5-9a*3+6a*2-20-(a*4+11*3-a*2.)=0

We add all the numbers together, and all the variables

a*5-9a*3+6a*2-(a*4-a*2.+33)-20=0

Wy multiply elements

5a-27a+12a-(a*4-a*2.+33)-20=0

We get rid of parentheses

5a-27a+12a-a*4+a*2.-33-20=0

We add all the numbers together, and all the variables

-10a-a*4+a*2.-53=0

Wy multiply elements

-10a-4a+2a-53=0

We add all the numbers together, and all the variables

-12a-53=0

We move all terms containing a to the left, all other terms to the right

-12a=53

a=53/-12

a=-4+5/12