Plz help! Math problems... What are the answers? How did u get them?

Question

1.. solve the equation

-2/9 y = 7/18 - 5/18

2.. Z/3 +1 = Z/6 + 5

3.Y/6 - 5 = 5

4. Determine whether the given value is a give solution to the equation.

X/3 = 3.75; x = 11.25

Answer 1

For the first one:

-2/9 y = 7/18 - 5/18 ----> Multiply both sides by 18:

18y(-2/9) = 18(7/18 - 5/18)

2y(-2) = 7 - 5

-4/y = 2

y = -1/2

Z/3 +1 = Z/6 + 5 ----> multiply both sides by 6:

2Z + 6 = Z + 30 -----> Subtract Z from each side:

Z + 6 = 30 --------> Subtract 6 from both sides

z = 24

Y/6 - 5 = 5 ----> Add 5 to both sides:

Y/6 - 5+5 = 5+5

y/6 = 10 ----> Multiply both sides by 6:

y = 60

#4 What equation?