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= Let Martina's cousin's age be = n
= Let her age be = n+12
After four years,
Cousin's age = n+4
Her age = n+12+4=n+16
But according to the question her age = 3(n+4) = 3n+12
Thus,
3n+12=n+16
3n-n=16-12
2n=4
n=4/2
Thus ,
Her cousin's present age = n = 2
Her cousin's present age = n = 2Her present age = n+12 = 2+12=14
Answer:
step 2
Step-by-step explanation:
Given
p = 2l + 2w ( subtract 2w from both sides )
p - 2w = 2l ← correct step 1
Now, divide both sides by the multiplier 2
= l