-81=-9(7+u)

Simple and best practice solution for -81=-9(7+u) 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 -81=-9(7+u) equation: 



-81=-9(7+u)

We move all terms to the left:

-81-(-9(7+u))=0

We add all the numbers together, and all the variables

-(-9(u+7))-81=0



We calculate terms in parentheses: -(-9(u+7)), so:

-9(u+7)

We multiply parentheses

-9u-63

Back to the equation:

-(-9u-63)



We get rid of parentheses

9u+63-81=0

We add all the numbers together, and all the variables

9u-18=0

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

9u=18

u=18/9

u=2

See similar equations:

| 30+7t=t | | 19-19v+9=-14v-17 | | 11(k)=2k+5 | | –6−9w=–10w | | 40=x5 | | 2(x+1)+6x=34 | | 6x+55=–5 | | 45t=48 | | -8(6+x)=24 | | Y=6.75x | | 3D=-7+10d | | 282=(4x-5) | | 3x-17x+40x-5=180 | | 13x-9x=24+16 | | 3w+7=11w+15 | | 5+v+6=14=4 | | 9v+1+5v-3=180 | | 5x+12=29 | | 4x-6+70=12x | | 15+2c=1 | | 4n+8n+17=-23 | | (16x-6)=x | | 7-9m=-7 | | 4(x-3)=2(2x-6 | | t-8=2t | | -3(g+4)=2g-37 | | 6x+23+4x-3=90 | | 90=9a | | 15x-2x=-13 | | 3n+8+4=36 | | 0.02x=13+3 | | 5x-5=11x+9 |

Equations solver categories