Which of the following methods will solve the equation (5x – 7)3 = 42 a) Divide the left side of the equation by 3, add 7 to the right side of the
equation, and multiply both sides by 3.
b) Divide both sides by 3, add 7 to both sides, and multiply both sides by 3.
c) Add 7 to both sides, divide both sides by 3, and multiply the left sides by 3.
d) Multiply both sides by 3, add 7 to both sides, and then divide both sides by 3.

Divide both sides by 3, Add 7 to each side ,Divide each side by 5

Step-by-step explanation:

(5x – 7)3 = 42

Divide both sides by 3

(5x – 7)3/3 = 42/3

5x-7 = 14

Add 7 to each side

5x-7+7 = 14+7

5x = 21

Divide each side by 5

5x/5 = 21/5

x = 21/5

24+x=y

step-by-step explanation:

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.