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Gabrielle is 5 years older than Mikhail. The sum of their ages is 45 . What is Mikhail's age?
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May 28, 2018
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Gabrielle is 5 years older than Mikhail. The sum of their ages is 45 . What is Mikhail's age?
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Use a system of equations.
Age of Gabrielle: x
Age of Michael: y
x-5=y
x+y=45
x=y+5
(y+5)+y=45
2y+5=45
2y=40
y=20
Mikhail is 20 years old.
Hope this helps!
AndyDunn
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May 30, 2018
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g = Gabrielle
M = Mikhail
g + m = 45
g = m + 5
Input g into g + m = 45
(m+ 5) + m = 45
2m + 5 = 45
Subtract 5 from both sides.
2m = 40
Divide both sides by 2.
m = 20
Input m into g = m + 5
g = 20 + 5
g = 25
Mikhail is 20 years old.
Lekroif
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Jun 2, 2018
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Lekroif
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