21=u+6

Simple and best practice solution for 21=u+6 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 21=u+6 equation:


Simplifying
21 = u + 6

Reorder the terms:
21 = 6 + u

Solving
21 = 6 + u

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-1u' to each side of the equation.
21 + -1u = 6 + u + -1u

Combine like terms: u + -1u = 0
21 + -1u = 6 + 0
21 + -1u = 6

Add '-21' to each side of the equation.
21 + -21 + -1u = 6 + -21

Combine like terms: 21 + -21 = 0
0 + -1u = 6 + -21
-1u = 6 + -21

Combine like terms: 6 + -21 = -15
-1u = -15

Divide each side by '-1'.
u = 15

Simplifying
u = 15

See similar equations:

| 6-3x=5x-10 | | 5c+-15=2c+6 | | b+12=-1 | | 9x+7-4x=x+15 | | 6x+12=3x+36 | | X=6y-3x | | a^2f^2-49=0 | | 1-8k=k-6-5k-9 | | 8x-x+7-(5x)+(-8)=23 | | -5(x+7)-4= | | 6-3x=6x-10x+6 | | q-8=16 | | 2x+5(7-x)=6x-4-x | | 4x+7x=44 | | 3(5x-2)=-36 | | 24.2+5p=28.65 | | -9+(x+6)=28 | | (2xy)(5xy)=0 | | -46=-(5-5x)-8(1+2x) | | 43+62+57= | | 11t-5=3t+3 | | -3y=-9x-1 | | 3x+4(2x+3)=276 | | D+31=-24 | | 5(2n-8)+2(n-4)=48 | | 19-13p=12p-5 | | c^2+18c+81=0 | | -2+2(2x+7)= | | 2(c+3)-c=8 | | 12-5y=14 | | -3[4x+3]+4[6x+1]=-4x-8x | | 0.15(70)+a=0.2(70+a) |

Equations solver categories