Math Problems x5

Question

Andrew is 8 years older than Christy. In 8 years the sum of their ages will be 90. How old is Andrew now?

Answer 1

Let x = Christy's current age

Then x + 8 = Andrew's current age

Their ages 8 more years

Christy's x+8

Andrew's x +16s

The sum of their ages will be 90

x+8 + x + 16 = 90

Combining like terms gives

2x + 24 = 90

2x = 66

x = 33

Check

Current Ages

Christy is 33

Andres is 41

Age in 8 Years

Christy - 41

Andrew = 49

Total Age = 90

x =

Answer 2

C = Kristy's Age

C + 8 = Andrew's Age

C + 8 = Kristy's Age in 8 years

C + 8 + 8 = Andrew's Age in 8 years

C + 8 + C + 8 + 8 = sum of ages in 8 years = 90

2C + 24 = 90

2C = 66

C = 33

C + 8 = 41 Andrew's Age