Question 1163548: Isabel is 7 years older than Marie in 6 years, Isabel’s age will be 11 years less than twice Marie’s age. How old is each now? Answer by ikleyn(52781) (Show Source):
Hey, the punctuation signs were invented/introduced to use them properly (!)
Marie's age = x
Isabel's age = (x+7)
In 6 years
(x+7) + 6 = 2*(x+6) - 11
x + 13 = 2x + 12 - 11
x + 13 = 2x + 1
13 - 1 = 2x - x
x = 12.
ANSWER. Marie is 12 years old; Isabel is 12+7 = 19 years old.
