Equivalent ratios both the numerator and denominator by the same value, e.g.
27/30
18/20
For this case we have the following system of two equations with two unknowns:

Adding both equations we have to eliminate the variable "x":

Adding common terms, keeping in mind that different signs are subtracted and the sign of the major is placed:

Answer:

Option A
Well id like to inform you but you got it right already its 3/4
Because to get your answer you would have to set up the equation 5 and 1/4
divided by 7 which would be 3/4 in a fraction or .75 decimal
2 - 125x = 0,5x - 5
-125x - 0,5x = -5 -2
-125,5x=-7
x= -7/-125,5
x=0,05...