solve the following simultaneous equation algebraically,for a and b

Question

8a+5b=23
12a+3b=12

Answer 1

Here is one way. Subtract the second equation from the first.

-4a+2b=11
double it
-8a+4b=22
now add that to the first equation.
9b=45
b=5
Put that b into either equation and solve for a.

Answer 2

this is hard!!!!!

Answer 3

{4a+5b=23