Math

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Maria is three times as old as her brother.In 4 years,Maria will be twice as old as he will be then.How old is Maria's brother now?

• Math -

Help need equation

• Math -

Let x = maria's age and y = her brother's.

x = 3y

(x+4) = 2(y+4)

Substitute 3y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

• Math -

6=24

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y=4
x=12

• Science -

Lindana

• Math -

Waste quedtion

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