Question

(07.05 HC)

Answer 1

Answer:

D

Step-by-step explanation:

1. The equation actually goes: 2(y+8)=4y
2. 2y+16=4y
3. -2y      -2y    (must minus 2y from both sides)
4. 16=2y
5. divide both sides by 2
6. Y=8

Answer 2

Answer:

D. 2 should be distributed as 2y + 16; y = 8

Step-by-step explanation:

We have $2(y+8)=4y$ we are going to solve it step by step:

1. $2(y+8)=4y$

2. We have to distribute 2, then:

$2y+16=4y$

3. Now we have to sum (-2y) in both sides of the equation:

$2y+16-2y=4y-2y\\16=2y$

4. Finally we have to divide both sides of the equation in 2:

$16=2y\\\\\frac{16}{2}=\frac{2y}{2}\\ 8=y$

Then the correct answer is option D, in step 2: 2 should be distributed as 2y+16, and resolving the equation we obtain that y=8 .