chris is 2 years old and jenny is 4 years old. in how many years will jenny be 7 years younger than twice chris' age?

Answer 1

2+x = 2( 4+x) - 7

2 + x = 8 + 2x - 7

2 + x = 2x + 1

2 = x + 1

x = 1

In only 1 year, Chris and Jenny shall be 3 and 5. That is, 2(5) - 7 = 10 - 7 = 3