Question

Show all your work. 2a+3b=-1 3a+5b=-2

Answer 1

here 2a+3b=-1
so 2a = -1-3b ( by transposing 3b to RHS)
a = (-1-3b)/2
putting the value of a in the 2nd equaion :
3(-1-3b)/2 + 5b=-2
(-3-9b)/2 + 5b=-2
(-3-9b+10b)/2 = -2
(-3+b)/2=-2
(-3+b)=-4
b=-4+3
b=-1
here 2a-3=-1
2a=2
a=1