-7(8-5r)=21

Simple and best practice solution for -7(8-5r)=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(8-5r)=21 equation: 


Simplifying
-7(8 + -5r) = 21
(8 * -7 + -5r * -7) = 21
(-56 + 35r) = 21

Solving
-56 + 35r = 21

Solving for variable 'r'.

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

Add '56' to each side of the equation.
-56 + 56 + 35r = 21 + 56

Combine like terms: -56 + 56 = 0
0 + 35r = 21 + 56
35r = 21 + 56

Combine like terms: 21 + 56 = 77
35r = 77

Divide each side by '35'.
r = 2.2

Simplifying
r = 2.2

See similar equations:

| w/-3=-3 | | X^2+6x-b^2/2 | | 14+6/18x=40 | | 4x-7+2x=9x+15 | | 50-6t=100 | | 3x+9x-(6x+5)= | | -12x^3+60x^2+75x=0 | | 46+x=21 | | a+5d-7=0 | | z-36=-42 | | 1-4c=980 | | 7(x-4)=35 | | 11x+5-4x-3=15 | | 10-5z=10z-26 | | 2/3x-10=22 | | 3.4x+12.3=-1.3 | | a^2-2a=3 | | 0.05(4-x)+0.1=0.32 | | 147/21 | | -[7x+(9x+7)]=9-(4x+6) | | 34+x=6 | | x/12/9=-27 | | F(x)=x^2+6x-7 | | 6=34+x | | (-2x+3)= | | 1/2x+2/5x-4/5=-1 | | 9+2x=48 | | 3x+x+1=2 | | 3p+18= | | 1/4b=16 | | 9+2x=240 | | 270+3x=4(x+30) |

Equations solver categories