Math hw plz idk how to do it

40 - 5x = 4(7 - 2x) + 5x

First, distribute 4 to all terms within the parenthesis

4(7 - 2x) = 28 - 8x

40 - 5x = 28 - 8x + 5x

Combine like terms

40 - 5x = 28 (-8x + 5x)

40 - 5x = 28 - 3x

Isolate the x. Add 3x to both sides, and subtract 40 from both sides

40 (-40) - 5x (+3x) = 28 (-40) - 3x (+3x)

-5x + 3x = 28 - 40

-2x = -12

Divide -2 from both sides

-2x/-2 = -12/-2

x = -12/-2

x = 6

6 is your answer

hope this helps

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.