What is
4x + 6 = 8x − 10

x=4

Step-by-step explanation:

4x+6=8x-10

6= 8x-10-4x

6=4x-10

6+10=4x

16=4x

16/4=x

4=x

x=4

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8