Question 141489
45X+55(10.4-X)=497
45X+572-55X=497
-10X=497-572
-10X=-75
X=-75/-10
X=7.5 HOURS WAS KATHY'S DRIVING TIME.
10.4-7.5=2.9 HOURS FOR JAN'S DRIVING TIME.
PROOF
45*7.5+55*2.9=497
337.5+159.5=497
497=497