Respuesta :
Expand 8(5-r)/5=-2r as indicated: 40 - 8r
----------- = - 2r
5
Multiply both sides by 5, obtaining 40 - 8r = - 10r
Combine like terms: 40 = - 2r
Divide both sides by -2: -20 = r
The solution to 8(5-r)/5=-2r is -20. Verify this by subbing -20 for r in the given equation.
First, write out the equation:
8 * (5 - r) = -2r
Now, distribute the left side:
40 - 8r = -2r
Add 8r to both sides to isolate the variable:
40 = 6r
Divide by 6:
r = 40/6
Simplify:
r = 20/3