-7[5-r]=21

Simple and best practice solution for -7[5-r]=21 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 -7[5-r]=21 equation: 


Simplifying
-7[5 + -1r] = 21
[5 * -7 + -1r * -7] = 21
[-35 + 7r] = 21

Solving
-35 + 7r = 21

Solving for variable 'r'.

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

Add '35' to each side of the equation.
-35 + 35 + 7r = 21 + 35

Combine like terms: -35 + 35 = 0
0 + 7r = 21 + 35
7r = 21 + 35

Combine like terms: 21 + 35 = 56
7r = 56

Divide each side by '7'.
r = 8

Simplifying
r = 8

See similar equations:

| x+y+5x+3y= | | X^2=49/121 | | 40-3m=-23 | | 14-3x+5x+15+7x-9= | | 2r-8s=12 | | 3x(x+4)+2=12 | | 3(x+4)=(x/2)-8 | | (-3x+4)=-2(6x-8) | | 2x-4(3x+6)=6(2x-1)-4 | | 3x-6=4x-17 | | -3(x-2y)=5x | | 5+2(10x+3)= | | 16/x+9=8/5 | | -3[2-r]=18 | | (6+7i)= | | 4r-6s=22 | | -3(2x+1)=2(3x-1) | | (42(13+x))/(13-x)+(42(12-x))/(13+x)=6.5 | | 3x-5=4x-18 | | 5(10+3x)=95 | | 7/(x+9)=21/36 | | k-1/4=k/3+73/4 | | -4y-7=6y+23 | | 3/4-1/2=16 | | 5=-3x+8 | | -7a/4b | | r+9r-5+2r=-9 | | -5x=13+3m | | X^2=368 | | 3x-9=4x-21 | | 10x-2x+4=68 | | 10y-7x=-110 |

Equations solver categories