Mr. Luca would like to purchase a digital keyboard for each of his three nieces in on nephew the keyboard cost $105 right and solve an equation to find the total cost of the keyboard explain why your answer is reasonable

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

it would be 6xy and -16xy.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x