0.25r−0.125+0.5r=0.5+r First, you combine like terms.
(0.25r+0.5r)−0.125=0.5+r
0.75r−0.125=0.5+r Then, you subtract r from both sides.
- r = - r
−0.25r−0.125=0.5 Then, you subtract 0.125 from both sides.
- 0.125 = -0.125
−0.25r=0.375 Then, because you can't have a neagtive
variable, you multiply both sides by -1.
−0.25r∗−1=0.375∗−1
0.25r=−0.377 Finally, you divide both sides by 0.25.
0.25r0.25=−0.3750.25
r=−1.5
Hope this helps!
-RedGlasses 