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.
solve the following simultaneous equation algebraically,for a and b
8a+5b=23
12a+3b=12
3 answers
this is hard!!!!!
{4a+5b=23