-7r+21=21+4r

Simple and best practice solution for -7r+21=21+4r 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 -7r+21=21+4r equation: 



-7r+21=21+4r

We move all terms to the left:

-7r+21-(21+4r)=0

We add all the numbers together, and all the variables

-7r-(4r+21)+21=0

We get rid of parentheses

-7r-4r-21+21=0

We add all the numbers together, and all the variables

-11r=0

r=0/-11

r=0

See similar equations:

| 7f+16=9f-20 | | 4-2x+107=55 | | -5(a+2)-(a-4)=28 | | 28.8=x+1.40 | | 0.636-3.71x+5.3x^2=x | | x*x=0.01 | | -5z-1=-2z+10 | | 2g+3=6g-13 | | x/60=7000 | | 7/3x-1/3+3/5x=1/15 | | 3(x-4)x3x(x-4)=2x+6 | | 4+m/8=3 | | 5b+7=2b+5+3b | | -{7-4x}=9 | | 8-2f=-6f | | -(5x-5)-(6x-)+8=-7(x-1)-(9x+6)+3 | | 1/7y+1/8=1/7 | | -31-4x=1515(1+5x) | | 3(x-4)3(x-4)=2x+6 | | 7m=30 | | (5t+7)17t=55 | | 2.1/7.7=r/8.8 | | 7(8-8m)=112 | | (30/x)=4/6 | | 6x-8=-6x+20 | | 60+26x=30x | | |3x+12|=60 | | 4-2x+55=107 | | 2g+14+5g+8g=-3+8 | | 2/3(x+5)=8 | | 6d=8+10d | | 7p-(3p+4)=-2(2p-1)+20 |

Equations solver categories