Kimberly read a total of 12 books over 2 months. If Kimberly has read 18 books so far, how many months has she been with her boo
1 answer:
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Step-by-step explanation:
let the speed of diesel train = x
the equation would be:
(2+6)x = 6(x+15)
8x = 6x+90
8x-6x = 90
2x = 90
x = 90/2
x = 45
Therefore, the speed of diesel train =
45 mph
