Answer:
x=2
Step-by-step explanation:
2.25x-9.5x=.5-15
-7.25x=-14.5
x=2
Answer:
Step-by-step explanation:
-12+5x=-24+x
4x=-12
x=-3
Reduces to 8=-3. no solutions
<span>A freight train completes its journey of 150 miles 1 hour earlier if its original speed is increased by 5 miles/hour. What is the train’s original speed?
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let x=original speed
x+5=increased speed
travel time=distance/speed
..
lcd:x(x+5)
150(x+5)-150x=x(x+5)
150x+750-150x=x^2+5x
x^2+5x-750=0
(x-25)(x+30)=0
x=25
What is the train’s original speed? 25 mph</span>
