3u+21=-4(u-7)

Simple and best practice solution for 3u+21=-4(u-7) 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 3u+21=-4(u-7) equation:


Simplifying
3u + 21 = -4(u + -7)

Reorder the terms:
21 + 3u = -4(u + -7)

Reorder the terms:
21 + 3u = -4(-7 + u)
21 + 3u = (-7 * -4 + u * -4)
21 + 3u = (28 + -4u)

Solving
21 + 3u = 28 + -4u

Solving for variable 'u'.

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

Add '4u' to each side of the equation.
21 + 3u + 4u = 28 + -4u + 4u

Combine like terms: 3u + 4u = 7u
21 + 7u = 28 + -4u + 4u

Combine like terms: -4u + 4u = 0
21 + 7u = 28 + 0
21 + 7u = 28

Add '-21' to each side of the equation.
21 + -21 + 7u = 28 + -21

Combine like terms: 21 + -21 = 0
0 + 7u = 28 + -21
7u = 28 + -21

Combine like terms: 28 + -21 = 7
7u = 7

Divide each side by '7'.
u = 1

Simplifying
u = 1

See similar equations:

| 2n^2+9n+4=0 | | 4x+3(2x-6y)-y= | | 2t-1=(t+7) | | 9x^2+24x=16 | | 16+b^2=64 | | 5x(x-1)+5=7+x(1-2x) | | 100+8x=12x | | -39x-26x=-39 | | 36x^4-25=0 | | (x-2)+y^2=64 | | A=5-2(n-1) | | 46=654 | | 5/9=2x=13/9 | | 10x^5=100 | | 8x+y=-6 | | y=tan*(5*X) | | -32(16x)-y+9=0 | | 2.4m-1.2=0.6m | | f(x)=4x^4-5x-3 | | 8x+12y=9 | | 3/8x9= | | (2u+5x-6)(u+7x)= | | 8x-(5-1x)=-44 | | (2u+5x-6)x(u+7x)= | | -32x-y+9=0 | | 2x^3+x^2+5x-3=0 | | -8/7=-1/3w-5/6 | | 4(b+4)-2=-5(B+7)+2b | | 6+6x=-6x-66 | | 36x^2-6=12x^2-3 | | f(x)=8x^2 | | -1/2-4/3v=1/5 |

Equations solver categories