<PRE><B>Question 207010</B>
180/26=X/30+(180-X)/20
180/26=(20X+30(180-X))/30*20
180/26=(20X+5400-30X)/600
180/26=(5400-10X)/600
26(5400-10X)=600*180
140,400-260X=108,000
-260X=108,000-140,400
-260X=-32,400
X=-32,400/-260
X=124.6 MILES @ 30 MPH.
180-124.6=55.4 MILES @ 20 MPH. OF LOCAL DRIVING.
PROOF:
180/26=124.6/30+55.4/20
6.923=4.153+2.77
6.923=6.923</PRE>