Respuesta :

AnimeBrainly
1.20(x) = 72.00

1.20(x)/1.20 = 72.00/1.20

x = 60
The barrel of oil costed 60 dollars before the increase
hope this helps
calculista

Answer:

[tex]\$60[/tex]

Step-by-step explanation:

Let

x------> the cost of the barrel of oil before the increase

we know that

[tex]100\%+20\%=120\%[/tex]

[tex]120\%=\frac{120}{100} =1.2[/tex]

so

[tex]1.2x=72[/tex]

Solve for x

[tex]x=72/1.2=\$60[/tex]