Question

Someone anybody please help

Answer 1

This is a system of equations problem that can be solved using one of three methods: graphing, substitution, or elimination. I'll be using substitution.

In substitution:
1) Solve one equation for either variable. I'll use the first equation because its easier to solve for one of the variables. I'll be solving for y because that will allow us to solve for the value of x faster.

`x+y=60`

`y=60-x`

2) Substitute what you get into the other equation:

`20x + 5y = 600`

`20x + 5(60-x) = 600`

3) Solve your new equation in step 2 for the variable, x.

`20x + 5(60-x) = 600`

`20x + 300-5x = 600`

`15x + 300 = 600`

`15x = 300`

`x=20`

There are D) 20 $20 bills in her drawer.