Question 85301
C+V=86 C=86-V
5C+6V=475 NOW SUBSTITUTE (86-V) FOR C AND SOLVE FOR V.
5(86-V)+6V=475
430-5V+6V=475
V=475-430
V=45 VANS WASHED.
C+45=86
C=86-45
C=41 CARS WASHED.
PROOF
5*41+6*45=475
205+270=475
475=475