You need to get x alone. So first you bring the 13 over and it becomes negative because it switches signs when switching sides
13x=104-13
13x=91
The you have to divide by 13 since you are multiplying on the other side
X=91/13
Your final answer should be
X=7
Answer:
Plane speed is 60 miles/hour
Wind speed is 20 miles/hour
Step-by-step explanation:
Lets suppose the speed of the plane in still air is s and speed of the wind is w and since speed in the formula below equals speed of the plane plus the wind's speed so speed=s+w for this journey with the wind


For the first journey the trip with the wind:

Here we got our first equation for the second equation we use the information from the second trip which was into the wind. Which means the speed here would be speed=s-w

so now we got our two equations adding both equations would result into the following:

so speed of the plane is 60 miles/hour put the value of s in any our two equations to calculate the wind speed, lets take the first equation:

so the wind speed is 20 miles/hour
I know you already got this answered, but I need points. Can I get brainliest?
Answer:
he earned 14 dollars
Step-by-step explanation:
if you are looking for how much did he earn you take the number that they started with and subtract it from what they have after so the equation is $21-$7 and thats how much he eaened
Answer:
250
Step-by-step explanation:
Since you are looking for the amount of shirts he had you will need to divide 25 by .10 or just multiply by 10.