Question

(20 points) (literal equations)

Solve y = x + 4 for x.


x = y − 4
x = y + 4
x = −y + 4
x = −y − 4

Answer 1

y = x + 4

move +4 to the other side

sign changes from +4 to -4

y-4= x+4-4

y-4= x

Answer:

x=y-4

Answer 2

Correct option is:

x = y − 4

Explanation:

We have to solve y=x+4 for x

y=x+4

or x+4=y

subtracting both sides by 4

x+4-4=y-4

x=y-4

Hence, Correct option is:

x = y − 4