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there are 20% more goblins than wizards in magic club. There are 220 goblins and wizards all together in magic club. How many goblins are in magic club?

Respuesta :

120 is your answer.

Hope this helped!
Assume x = goblins, y = wizards

x = y x 120%
x + y = 220

Substitute x = y x 120% into the equation
[tex]y \times 120\% + y = 220 \\ \frac{120y}{100} + y = 220 \\ 1.2y + y = 220 \\ 2.2y = 220 \\ y = 100[/tex]

Substitute y = 100 into equation
[tex]x = 100 \times 120\% \\ x = 100 \times \frac{120}{100} \\ x = 120[/tex]

There are 120 goblins in the magic club.

Hope this helps. - M