Question 594485
Write an equation for each statement
:
An automobile dealership sells cars that are small, medium, and large.
 Last year they sold 1475 cars.
S + M + L = 1475
:
They sold twice as many small cars as large ones.
s = 2L
or we can divide both sides by 2
.5s = L
:
They sold 90 less medium-sized cars than they did small ones.
m = s-90
;
In the 1st equation, replace M with (S-90), and L with .5S
S + (S-90) + .5S = 1475
2.5S = 1475 + 90
2.5S = 1565
S = 1565/2.5
S = 626 small cars
then
M = 626 - 90
M = 536 Medium cars
and
L = .5(626)
L = 313 large cars
:
:
See if that checks out: 626 + 536 + 313 = 1475