solve the following simultaneous equation algebraically,for a and b

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

3 answers

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.
this is hard!!!!!
{4a+5b=23
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