Question

Question content area top
Part 1
Solve the equation.
10 r plus 9 equals 109
Question content area bottom
Part 1
A.90
90
B.1
1
C.10
10
D.94
94

Answer 1

To solve the equation \( 10r + 9 = 109 \), we can follow these steps:

1. Subtract 9 from both sides of the equation:
\[
10r + 9 - 9 = 109 - 9
\]
Simplifying gives us:
\[
10r = 100
\]

2. Now, divide both sides by 10 to isolate \( r \):
\[
r = \frac{100}{10}
\]
Simplifying gives us:
\[
r = 10
\]

Therefore, the solution to the equation is \( r = 10 \).

The correct answer is **C. 10**.