What is the value of x in the equation 3(2x + 4) = −6? (4 points) a
−3

b
1

c
12

d
19

x = - 3

Step-by-step explanation:

Given

3(2x + 4) = - 6 ( divide both sides by 3 )

2x + 4 = - 2 ( subtract 4 from both sides )

2x = - 6 ( divide both sides by 2 )

x = - 3

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.