Subtract original amount from new amount:
84 - 39 = 45
He bought 45 books.
Answer:
A=5 hope this works
Step-by-step explanation:
What planet?
Like mars?
12=5x-13x-44
combine like terms
12 = -8x -44
add 44 to each side
12+44 = -8x
56= -8x
divide by -8 on each side
56/-8 = x
-7 =x
