Answer: 1
Explanation:
First off I believe that it should be set up like so: 4a - 7b +9 = 8a -7b + 13 if you don’t know already he first step before we eliminate is to combine like terms that are on the same side which unfortunately for this problem there are none so we go straight to eliminating. The best way to eliminate is to find what’s smallest such as -7b which we switch to +7b and add to the -7b on her other side or right side of the problem which gives us 0. Now let’s do 4a and 8a, we first should turn 4a into -4a and subtract that from 8a to get 4a. Now lastly we are left with 9 and 13 which we will turn he 9 into -9 and subtract from 13 getting us 4 and 4a=4 which is the same as 4a divided by 4 is one
