Question

A textbook store sold a combined total of 382 chemistry and biology textbooks in a week. The number of biology textbooks sold was 58

less than the number of chemistry textbooks sold. How many textbooks of each type were sold?
Number of chemistry textbooks sold:
Number of biology textbooks sold:

Answer 1

chemistry books is 220 and number of biology books is 220

Explanation:

let y be biology books

let x be the number of chemistry books

x-58=y

equation 1 ) x+y=382

sub in x-58 for y

2. x+(x-58)=382

3. 2x-58= 382

4. 2x=382-58

5. 2x = 324

6. x/2 =324/2

7. x = 162

for x=y+58

y=162

x 220

220+162=382

y+x=382