Respuesta :
Answer: r=0.8
Step-by-step explanation:
4r + 8 = 7.2 + 5r
-4r -4r
8=7.2+r
8-7.2=r
0.8=r
Answer: [tex]r=0.8[/tex]
Step-by-step explanation:
-Solve:
[tex]4r+8=7.2+5r[/tex]
-Subtract [tex]5r[/tex] from both sides:
[tex]4r+8-5r=7.2[/tex]
Combine [tex]4r[/tex] and [tex]5r[/tex] to get [tex]-r[/tex]:
[tex]-r+8=7.2[/tex]
-Subtract [tex]8[/tex] from [tex]7.2[/tex] to get [tex]-0.8[/tex]:
[tex]-r=7.2-8[/tex]
[tex]-r=-0.8[/tex]
-Multiply both sides by [tex]-1[/tex]:
[tex]r=0.8[/tex]
-Result:
[tex]r=0.8[/tex]
