Can someone help with the algebra word problem?

Derek is 70 and his granddaughter Vanessa is 5. In how many years will Vanessa be 1/6 Dereks age.An explanation is appreciated. or:Derek is 70 and his

Derek is 70 and his granddaughter Vanessa is 5. In how many years will Vanessa be 1/6 Derek's age.

An explanation is appreciated.

or:Derek is 70 and his granddaughter Vanessa is 5. In how many years will Vanessa be 1/6 Derek's age.An explanation is appreciated.

or:When he's 78 she will be 13. So it's 8 years from now.

or:Derek is 70, Vanessa is 5. So in x years Derek is (70 + x) and Vanessa is (5 + x).The condition is that Derek is then 6 times older than Vanessa. 70 + x = (5 + x)*670 + x = 30 + 6x | -30 -x5x = 40x = 8.

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