Answer:
y=5
Step-by-step explanation:
7y-y=6y
30/6 = 6y/6
5 = y
Answer: First option.
Step-by-step explanation:
Marta needs to subtract
from both sides of the equation:



Now she needs to divide both sides of the equation by
, then:

Rewriting:

Simplifying, she should get:

This matches with the first option.
Answer:
1)D 2)A 3)D 4)A 5)A
I hope this help but in question 6 you can report
This is set up as a proportion, so let’s cross multiply the values. When you do, you should get 21 = 6x. Now, divide each side by 6 to isolate the “x”. 21/6 is 3.5. x = 3.5. The unknown value is 3.5.