20=4(-9+r)

Simple and best practice solution for 20=4(-9+r) equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 20=4(-9+r) equation: 



20=4(-9+r)

We move all terms to the left:

20-(4(-9+r))=0

We add all the numbers together, and all the variables

-(4(r-9))+20=0



We calculate terms in parentheses: -(4(r-9)), so:

4(r-9)

We multiply parentheses

4r-36

Back to the equation:

-(4r-36)



We get rid of parentheses

-4r+36+20=0

We add all the numbers together, and all the variables

-4r+56=0

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

-4r=-56

r=-56/-4

r=+14

See similar equations:

| 174=6x+6(x+9) | | 27/n=9/5 | | 39/2=n/4 | | 5(2x+30)=15 | | x÷4.1=-2 | | X^2-20x-78=7 | | 5/12=35/n | | -9(a-5)=-18 | | -2x-4=0.5+5 | | -499=5-8(-7+7m) | | 2p+9=-5p | | –9(a–5)=–18 | | 4x-8-2x=x+2 | | 124=2(5x+12) | | 3-9=-8x+14 | | -4y-5-4(-2y+3)+8=3 | | 18x-8x^2=8 | | 1/5(20x-10)=4x+7 | | 13=5+3b=13 | | 0,2(20x-10)=4x+7 | | 2x2-6x-50=0 | | 2x2-2x=1 | | 17x^2-136x+204=0 | | 4(x-2)=-2x+16 | | −5r+8r+5= | | 3x2+5x+1=0 | | |2x−10|=−3x | | x=245/(x-1) | | 2x2-10x+7=0 | | 7(5+4x)-(3-x)=0 | | N^=18n+40 | | x^2+42x+6=0 |

Equations solver categories