Respuesta :
Answer: [tex]r=14[/tex]
Step-by-step explanation:
1) Move all terms to the left: [tex]-28+10r-5r-(42)=0[/tex]
2) Add all the numbers together, and all the variables: [tex]5r-70=0[/tex]
3) Move all terms containing r to the left, all other terms to the right: [tex]5r=70[/tex]
[tex]r=70/5[/tex]
[tex]r=14[/tex]
Answer:
r = 14
Step-by-step explanation:
-28 + 10r - 5r = 42
(Subtract the like terms, 10r - 5r)
-28 + 5r = 42
(Add +28 to each side)
+28 - 28 + 5r = 42 + 28
(Subtract like terms, 28 - 28 and add terms 42 + 28)
5r = 70
(Divide each side by /5)
5/5r = 70/5
(Divide)
r = 14