8-3p=2(4-5p)-21

Solution for 8-3p=2(4-5p)-21 equation:

8-3p=2(4-5p)-21

We move all terms to the left:

8-3p-(2(4-5p)-21)=0

We add all the numbers together, and all the variables

-3p-(2(-5p+4)-21)+8=0


We calculate terms in parentheses: -(2(-5p+4)-21), so:

2(-5p+4)-21

We multiply parentheses

-10p+8-21

We add all the numbers together, and all the variables

-10p-13

Back to the equation:

-(-10p-13)


We get rid of parentheses

-3p+10p+13+8=0

We add all the numbers together, and all the variables

7p+21=0

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

7p=-21

p=-21/7

p=-3