Please if you can help me with this

Question

Layla had brochures printed for her new business venture. She originally ordered 3 boxes of black-and-white brochures and 4 boxes of color brochures, which cost a total of $120. After those ran out, she spent $132 on 4 boxes of black-and-white brochures and 4 boxes of color brochures. Given that the prices didn't change, what was the price of each type of brochure?

The prices were $ for a box of black-and-white brochures and

$ for a box of color brochures.

Answer 1

3b +4c = 120

4b+4c =132

b = $12 for black and white

b+c =132/4 = 33

c= 33-12= $21 for color