If 1/x+ 1/y= 1/4 and 1/x-1/y=3/4, then x=
a) 1/4
b) 1/2
c) 2
d) 4
someone

C) 2

Step-by-step explanation:

1/x+ 1/y= 1/4 and 1/x-1/y=3/4

Add  the two equations together

1/x+ 1/y= 1/4

1/x-1/y=3/4

2/x = 4/4

2/x =1

Multiply each side by x

2/x *x = 1x

2 =x

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons