7u+21=3u+15

Simple and best practice solution for 7u+21=3u+15 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 7u+21=3u+15 equation:


Simplifying
7u + 21 = 3u + 15

Reorder the terms:
21 + 7u = 3u + 15

Reorder the terms:
21 + 7u = 15 + 3u

Solving
21 + 7u = 15 + 3u

Solving for variable 'u'.

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

Add '-3u' to each side of the equation.
21 + 7u + -3u = 15 + 3u + -3u

Combine like terms: 7u + -3u = 4u
21 + 4u = 15 + 3u + -3u

Combine like terms: 3u + -3u = 0
21 + 4u = 15 + 0
21 + 4u = 15

Add '-21' to each side of the equation.
21 + -21 + 4u = 15 + -21

Combine like terms: 21 + -21 = 0
0 + 4u = 15 + -21
4u = 15 + -21

Combine like terms: 15 + -21 = -6
4u = -6

Divide each side by '4'.
u = -1.5

Simplifying
u = -1.5

See similar equations:

| a-81=9a+7 | | 13=y-x | | 2(m+3)=13 | | 3x=x-8 | | 63-7x=20x+18 | | 12=x+4y | | 6h+15=8h+9 | | 2x+11=-88-9x | | -2(x-1)-9=-11 | | 5(x-5)+5=2x+3(-5+x) | | z-241.6=32.7 | | -44=2+7y | | -19-5x=8-8x | | t+18.5=-41 | | 2(b-4)=5(b+2)-9 | | p-1.1=4.4 | | 41x+26=6(6x+4)+5x+2 | | 4+7x=46+x | | 30+5.50x=8x | | 15-3r-16=8r+9-6r | | 8(3x+1)=2x-9x | | h+(-8.5)=-0.6 | | -20z-0.5=-30z+1.2 | | 3t-10=8 | | h+20.4=-15.7 | | 6x+22=9x+31 | | 4(x+3)+4=14 | | a+106.7=62.3 | | 6y-11=4y^2-28y+49 | | y-33.4=81.9 | | (2y+1)= | | x-5.8=2x |

Equations solver categories