Question

Just number 5 please help me :)

Answer 1

24 lbs

Explanation:

Let Andy's mountain bike weigh ' a' pounds.

The weight of Barry's mountain bike 6 pounds more than Andy's.

This implies that:

`b = a + 6`

If their bikes weigh 42 pounds altogether, then

`a + (a + 6) = 42`

We solve this linear equation:

Group similar terms;

`a + a = 42 - 6`

`2a = 36`

`a = (36)/(2)`

`a = 18`

Therefore

`b = 18 + 6 = 24`

Barry's bike weigh 24 lbs