solve using the multiplication principle.

Question

-1/2x=-3/4

Answer 1

the way you typed it...

multiply each side by -2
(-2)(-1/2)x = -2(-3/4)
x = 3/2

Answer 2

can you check if i have this one right 0.6x+2=1.4x-1

my answer is ¡Ý 3.75 im i correct

Answer 3

"can you check if i have this one right 0.6x+2=1.4x-1
my answer is ≥ 3.75 im i correct"

You have correctly solved the equation to get x=3/0.8 = 3.75.

However your statement of x≥3.75 would be incorrect since the question given is an equation, and not an inequality.