Algebra/aLGEBRA

Advertisement


Question
I need help finding the value of y  

f(x)=3/4x +7

please help

Answer
That looks like it is really to be written as f(x) = 3x/4 + 7 or f(x) = (3/4)x + 7
to ensure that the x is in the numerator of the fraction.

The function f(x) is used in place of y, so we have y = 3x/4 + 7.
Subtracting 7 from both sides gives y - 7 = 3x/4.
Multiplying both sides by 4/3 gives (4/3)(y-7) = x.
Turning the equation around gives x = (4/3)(y-7).

This can be rewritten as x = 4(y-7)/3 or x = (4y-28)/3 or x = 4y/3 - 28/3.

The answer book should have it in one of these forms.

Algebra

All Answers


Answers by Expert:


Ask Experts

Volunteer


Scott A Wilson

Expertise

Any algebraic question you've got. That includes question that are linear, quadratic, exponential, etc.

Experience

I have solved story problems, linear equations, parabolic equations. I have also solved some 3rd order equations and equations with multiple variables.

Publications
Documents at Boeing in assistance on the manufacturiing floor.

Education/Credentials
MS at math OSU in mathematics at OSU, 1986. BS at OSU in mathematical sciences (math, statistics, computer science), 1984.

Awards and Honors
Both my BS and MS degrees were given with honors.

Past/Present Clients
Students in a wide variety of areas since the 80's; over 1,000 of them have been in algebra.

©2016 About.com. All rights reserved.