What is the value of y in the solution to the system of equations 1/3x+1/4y=1

We think you wrote:

This solution deals with linear equations with two unknowns.

  [1] x/3 + y/4 = 1   [2] 2x - 3y = -30

// To remove fractions, multiply equations by their respective LCD

     Multiply equation [1] by 12

// Equations now take the shape:

Graphic Representation of the Equations :

Solve by Substitution :

// Solve equation [2] for the variable  x 
 

// Plug this in for variable  x  in equation [1]

// Solve equation [1] for the variable  y 

// By now we know this much :

// Use the  y  value to solve for  x 

Solution :

Page 2

We think you wrote:

This solution deals with linear equations with two unknowns.

  [1] x/3 + y/4 = 1   [2] 2x - 3y = -30

// To remove fractions, multiply equations by their respective LCD

     Multiply equation [1] by 12

// Equations now take the shape:

Graphic Representation of the Equations :

Solve by Substitution :

// Solve equation [2] for the variable  x 
 

// Plug this in for variable  x  in equation [1]

// Solve equation [1] for the variable  y 

// By now we know this much :

// Use the  y  value to solve for  x 

Solution :

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