Joshua needed to get his computer fixed. He took it to the repair store. The technician at the store worked on the computer for 5 hours and charged him $138 for parts. The total was $363. Which equation could be used to determine x, the cost of labor per hour?

You can use the equation 363=5x+138. Since we know what y is you can substitute the value of 363 or you can say y=5x+138 however since you know what y is I would fill it in. I don’t know what equation you guys work with but one of them should work. To find x just solve the equation like you would with a linear equation. Hope this helps!

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm