0

# Solve for y. 1/3 (y-7.50x2)= 40

What I have so far:

1/3 (y-7.50 x2) = 40
1/3 (y-15)= 40

I am not sure of the next step,

y-15 =40= y-5 = 13.33
3        3

Or

1/3(y-15 +15)=40 + 15
1/3(y) = 55

Any help would be appreciated :))

### 2 Answers by Expert Tutors

Tutors, sign in to answer this question.
Sihem F. | French native speaker tutor teaches French lessonsFrench native speaker tutor teaches Fren...
4.8 4.8 (37 lesson ratings) (37)
0
I agree

1/3(y -15) = 40
1/3y - 15/3 = 40  be careful of the sign !!!
1/3y -5 = 40
1/3y = 40 + 5
1/3y = 45
y = 45 x 3
y = 135
Michelle P. | Patient, Creative, Math tutor ready to help!Patient, Creative, Math tutor ready to h...
5.0 5.0 (129 lesson ratings) (129)
0
Hi Pj,

1/3(y-7.50x2)=40
1/3(y-15)=40.  This step is correct, simplify within the parentheses.
your next step is not correct because EVERYTHING  on the left side of the equation is multiplied by 1/3 and you just multiplied 15 by 1/3, so.....
3(1/3(y-15))=3(40). I would multiply both sides of the equation by 3 to eliminate the fraction giving you.....
y-15 =120. Makes it whole numbers and easier to solve
y-15 +15 = 120 +15. Perform the opposite operation to the whole number to isolate the variable
y = 135. Simplify and you get your solution