The mystery first name of a student in the class does not begin with a, b, c, d, e, or f. the names first letter comes before s, t, u, v, and w. the students whose names start with j, k, l, m, and n are not it. all letters from o through q are not it. x, y, z and g, h, i are not it. what is the first letter of the mystery name? explain how you completed the list.

R would be the letter

Step-by-step explanation:

d, x=8

step-by-step explanation:

simplifying

4x + -5 = 2x + 11

reorder the terms:

-5 + 4x = 2x + 11

reorder the terms:

-5 + 4x = 11 + 2x

solving

-5 + 4x = 11 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-5 + 4x + -2x = 11 + 2x + -2x

combine like terms: 4x + -2x = 2x

-5 + 2x = 11 + 2x + -2x

combine like terms: 2x + -2x = 0

-5 + 2x = 11 + 0

-5 + 2x = 11

add '5' to each side of the equation.

-5 + 5 + 2x = 11 + 5

combine like terms: -5 + 5 = 0

0 + 2x = 11 + 5

2x = 11 + 5

combine like terms: 11 + 5 = 16

2x = 16

divide each side by '2'.

51

step-by-step explanation:

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