Question

Gabrielle's age is three times Mikhail's age. The sum of their ages is
40
. What is Mikhail's age?

Answer 1

Let Gabrielle's age be G and Mikhail's age be M
G = 3*M --- (1)
G + M = 40 ---- (2)
Solve for M.
From (2): G = 40 - M
Put this in (1):
40 - M = 3M
Solve for M.

Answer 2

@aum is it 37?

Answer 3

No.
40 - M = 3M
solve for M

Answer 4

40-M=3M
-M -M
40=3
__ ___
3 3

=13.3

Answer 5

@aum

Answer 6

40 - M = 3M
+ M +M
add:
40 = 4M
divide by 4:
10 = M
or M = 10