Answer:
18
Step-by-step explanation:
Since he does 90 cars-----5 days
x cars--------1 day
we multiply 90 by 1 then over 5
=8x + (-3) (5) + (-3) (9x)
=8x + -15 + -27x
(8x + -27x) + (-15)
19x +-15
19x -15
x=2
bd/ba=be/bc
6/6+4=x+1/x+1+x
6/10=x+1/2x+1
12x+6=10x+10
12X-10X=10-6
2X=4
X=4÷2=2
5
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