Answer: $19x
Step-by-step explanation:
If she bought 2 racing cars,
= $5x +$5x = $10x (Because one car is 5x)
And if she bought 3 motor cycles,
= $3x + $3x $3x = $9x
Now we get our total amount = $10x + $9x = $19x
Hope I could help! :)
You do 14 - 9 = 5 which gives us h.
h = 5
The correct value for x is 35 for (3x+16) and (5x-54) both equal 121
Answer:
Step-by-step explanation:
Remark
The two trains are travelling towards each other. That means that their total distance = 912 km. Neither one has gone that distance by itself. The effect this has on the question is that you add the two rates multiplied by time.
Givens
r1 = x
r2 = x + 12
t = 3 hours
d = 912 km
Equation
d = r * t
r1 * t + r2 * t = 912
Solution
3x + 3*(x + 12) = 912 Remove the brackets
3x + 3x + 36 = 912 Combine like terms
6x + 36 = 912 Subtract 36 from both sides
<u> -36 -36</u>
6x = 876 Divide both sides by 6
6x/6 = 876/6
x = 146 km/h
Answer
Slow train = 146 km/hr
Fast train = 146 + 12 = 158 km/hr
