|3x+1|-1=8

Please help me ASAP

x = -10/3 and 8/3

Add 1 to both sides:

∣3x+1∣=8+1

There are two equations:

3x+1=9  and -(3x+1)=9

Solve the first one:

3x+1=9  

3x=9−1

3x=8

x=8/3

Solve the second one:

-(3x+1)=9

−3x−1=9

−3x=9+1

−3x=10

x=-10/3

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

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24