Someone me solve this:

noelle spent $36 on books and pens. she spent $12 more on books than she did on pens. how much did she spend on books?

i need with figuring out how to write the equation and solving it.

Noelle spent $24 on books

Step-by-step explanation:

36-12=24 she spent 24 on books and 12 on pens. 24+12=36. I hope this is right and I hope this helps!

Use a graphing calc.

Step-by-step explanation:

Slope-Intercept Form: y = mx + b

For the third equation, m = 2

y = 2x + b

3 = 3(2) + b

3 = 6 + b

b = -3

y = 2x - 3