Question

3. Ken solved the linear equation 2(5y - 1) = 18 using the following steps.

Step 1 2(5y - 1) = 18
Step 2 10y - 1 = 18
Step 3 - 10y = 19
Step 4
y = 1.9
Which statement is true about Ken's method?
A. Ken made a mistake between Steps 1 and 2.
B. Ken made a mistake between Steps 2 and 3.
C. Ken made a mistake between Steps 3 and 4
D. Ken solved the equation correctly.

Answer 1

A

Explanation:

he actually made a mistake in second step. Step 2 should be: 10y-2=18 and then 10y=18+2

we get 10y=20 /:10

y = 2