Question 60948
6s+2b=512
8s+5b=986
------------------ multiply equation 1 by -2.5 & add to the second equation
-15s-5b=-1280
8s+5b=986
------------------
-7s=-294
s=-294/-7
s=42
------------------
6*42+2b=512
252+2b=512
2b=512-252
2b=260
b=260/2
b=130
proof
8*42+5*130=986
336+650=986
986=986