Math / Linear Equations
posted by Ashley .
I was looking on a website that teaches linear algebra and it had this problem:
3x  15
_______ =0
2x + 1
And it says the answer is: x = 5
But I don't understand how to get that answer so I hope someone can give me step by step directions for it.

As long as x≠1/2, the denominator is not zero. In that case, the only way for the expression to be zero is when the numerator becomes zero, or
3x15=0, which gives x=5 as the root.
In the case when x=1/2, the expression becomes undefined, and no solution is possible.
Respond to this Question
Similar Questions

Algebra
What similarities and differences do you see between functions and linear equations studied in Ch. 3? 
math and desperate
What similarities and differences are there between functions and linear equations? 
algebra
What are the similarities and differences between functions and linear equations? 
Algebra
Determine if the relationship represented in the table is linear. If it is linear, write an equation. x 2 5 7 10 12 20 y 3 0 2 5 7 15 A) Linear; y = x  5 B) Linear; y = 5x C) Linear; y = x + 5 D) Not linear I'm thinking it's C … 
Algebra
What similarities and differences are there between functions and linear equations? 
math
What similarities and differences do you see between functions and linear equations studied in Ch. 3? 
Algebra 1
I need some help with Direct linear variation. I had tooken a test, and one of the questions on there said " Which equation represents a direct linear variation? 
mathlinear equations
Its a story problem: The flying W Ranch raises only cows and horses. There are total 340 animals. The owner prefers horses to cows, so he has 52 more horses than cows. a. Write two different linear equations to model this situation. … 
Algebra
Solving Linear Equations and Inequalities Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) 4x  3y + 5z =3 (2) 3x  2y + 5z=1 (3) my teacher gave me the answer … 
algebramath
Create a system of linear equations. Explain the steps for solving a system of linear inequalities. Make a system of linear inequalities problem. Please help me with this?