SOLUTION: the age of two sisters are 11 years and 19 years. in how many years' time will the sum of their ages be 70 years. form an equation.

Question 934395: the age of two sisters are 11 years and 19 years. in how many years' time will the sum of their ages be 70 years. form an equation.

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = number of years in future
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11 + x + 19 + x = 70
2x = 70 - 11 - 19
x = (70 - 11 - 19)/2
x = 20
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