Question 346978
First one:

0.01x=0.55

Divide each term in the equation by 0.01.
(0.01x)/(0.01)=(0.55)/(0.01)

Cancel the common factor of 0.01.
x=(0.55)/(0.01)

Divide 0.55 by 0.01 to get 42.
x=42


Second one:

(x)/(1200)=-0.12

Multiply each term in the equation by 1200.
(x)/(1200)*1200=-0.12*1200

Simplify the left-hand side of the equation by canceling the common factors.
x=-0.12*1200

Multiply -0.12 by 1200 to get -144.
x=-144

Third one:

-16.7x=367.4

Divide each term in the equation by -16.7.
-(16.7x)/(-16.7)=(367.4)/(-16.7)

Cancel the common factor of -16.7.
x=(367.4)/(-16.7)

Simplify the right-hand side of the equation by simplifying each term.
x=-22