5r^2-42r=27

Simple and best practice solution for 5r^2-42r=27 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 5r^2-42r=27 equation:


Simplifying
5r2 + -42r = 27

Reorder the terms:
-42r + 5r2 = 27

Solving
-42r + 5r2 = 27

Solving for variable 'r'.

Reorder the terms:
-27 + -42r + 5r2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -42r + 5r2 = 0

Factor a trinomial.
(-3 + -5r)(9 + -1r) = 0

Subproblem 1

Set the factor '(-3 + -5r)' equal to zero and attempt to solve: Simplifying -3 + -5r = 0 Solving -3 + -5r = 0 Move all terms containing r to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -5r = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -5r = 0 + 3 -5r = 0 + 3 Combine like terms: 0 + 3 = 3 -5r = 3 Divide each side by '-5'. r = -0.6 Simplifying r = -0.6

Subproblem 2

Set the factor '(9 + -1r)' equal to zero and attempt to solve: Simplifying 9 + -1r = 0 Solving 9 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1r = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1r = 0 + -9 -1r = 0 + -9 Combine like terms: 0 + -9 = -9 -1r = -9 Divide each side by '-1'. r = 9 Simplifying r = 9

Solution

r = {-0.6, 9}

See similar equations:

| 16+z=23 | | 2x+10+5x-40=180 | | -20=5(3x+5) | | 28k-24-10k=12 | | 3-18= | | 4x+22=108 | | 8t^2=10t-3 | | 3x+8x=9x-28 | | 75+(2x+1)=180 | | 4x+5y=75 | | y^2+18y+28=0 | | Y=2x-4x+10 | | 3x-5=(5x+12)2 | | 0.40x+0.65(40)=0.2(62) | | 4r+2=2r-6 | | x+1/5=-14(20x-124/5) | | 5cos(6x)+6=9 | | 3n+15=n-1 | | 2x-16=x+16 | | 3(x-3)=6x-5-3x | | 125p=3 | | 9x^2=-2x+1 | | 6x+5y=-3(2-y) | | 7x+3x(2x+6)=44 | | 60=100-2n | | x^2+20x+29=0 | | 5.2p-4+p=16.235 | | 3+4y=-15 | | 2(x-6.00)=10.00 | | 9x+0+10x= | | u-1.6=5.89 | | 18=72 |

Equations solver categories