Question

Which of the following best describes the solution to the equation below?

30

+

7
⁢
x

=

9
⁢
x
A.
no real solutions
B.
infinite real solutions
C.
exactly one real solution,
x

=

3
1
3
D.
exactly one real solution,
x

=

15

Answer 1

D. x=15

Explanation:

30 + 7x = 9x

move +7x to the other side

30 = 9x - 7x

30 = 2x

divide 30 with 2

x = 30 ÷ 2

x = 15