What is the justification for step 2 in the solution process

12y-40-4y=6y-18

step 1: 8y-40-67-18
step 2: 2y-40= -18

a. the addition property of equality
b. the subtraction property of equality
c. the multiplication property of equality
d. the division property of equality

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point

2/4 is the answer

step-by-step explanation:

x= total pieces

both ate 9 pieces

mindy ate 3 so troy ate 6

6= (1/4)x

x =24