Question

Alvin is 5 years older than elga. the sum of their age is 85. what is elga age

Answer 1

e = 40

a=45

Explanation:

a + e = 85

a = e+5

e + 5 + e = 85

2e = 80

e = 40

a=45

Answer 2

40 years old.

Explanation:

We can let Elga's age equal
`x`. Alvin's age can be equal to
`y`. We can make several equations from the information we know. We know that Elga's age plus five equal's Alvin's age.

`x+5=y`

We also know that the sum of their ages is 85.

`x+y=85`

We can substitute
`x+5` for
`y` in the second equation since
`x+5=y`, so we have the following equation:

`x+(x+5)=85`

We can combine like terms to get

`2x+5=85`

Subtracting 5 from both sides results in

`2x=80`

After that, we can divide both sides by 2 to get

`x=40`

Thus, Elga is 40 years old.