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.
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-> 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.
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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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