04-10-2018
Mathematics

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Mario and Luigi are brothers.marios age is three times the difference between Luigis age and the number 9.if Mario is 18 years old,how old is Luigi.show your work.

Respuesta :

meghanbf meghanbf

04-10-2018

To solve this, write an equation to model the situation and solve the equation.

The equation can be: [tex]3(x-9)=27[/tex]

Then solve the equation.

[tex]3x-27=18[/tex]

[tex]3x=45[/tex]

[tex]x=15[/tex]

Luigi is 15 years old.

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