Question

Just 3 Questions, help please! Thanks in advance!!

1. The solution x = 8 is a solution to which of the following equations?

A. x over 8 = 64

B. x over -2 = -4

C. 2 = x over 8

D. -64 = x over -8


2. What is the value of a in the equation 7a - 89 = 72?

A. 154

B. -24

C. -10

D. 23


3. What is the value of x in the equation 5x - 2 = 18?

A. -10

B. -9

C. 4

D. 7

Answer 1

x / -2 = -4...multiply both sides by -2
x = -4 * -2
x = 8
===============
7a - 89 = 72
7a = 72 + 89
7a = 161
a = 161/7
a = 23 <==
===============
5x - 2 = 18
5x = 18 + 2
5x = 20
x = 20/5
x = 4 <==