Question

Pregunta 6

Compound X is made up of two parts A and one part B. The mass of compound X is 45, and A has twice the mass of B. Which two equations would you solve to find the individual masses of A and B?

Answer 1

`A = 2B`

`A + B = 25`

Explanation:

Given

The first statement implies that:

`X = A + B` i.e the components of X

Reading further, we have:

`X = 45` ---- The mass of X

`A = 2B` --- The relationship between
`A\ and\ B`

Required

Two equations to represent the scenario

The two equations are:

`A = 2B` --- The relationship between
`A\ and\ B`

`X = A + B` i.e the components of X

Substitute 25 for X in the second equation

`25 = A + B`

`A + B = 25`

So, the equations are:

`A = 2B`

`A + B = 25`