4x-3y=-10 y=-10 substution

Question

I need to find what y and x equal to get the point

Answer 1

Hello Angel,

 

The following is the breakdown of the solution to your math problem:

 

English: substitute y = -10 into first equation and solve for x 

Math:

4x - 3(-10) = -10

 

English: Evaluate

Math:

4x - -30 = -10

 

English: Evaluate

Math:

4x + 30 = -10

 

English: subtract 30 from each side

Math:

4x + 30 - 30 = -10 - 30

4x = -40

 

English: divide each side by 4

Math:

4x/4 = -40/4

x = -10

 

English:Check answer in first equation by substituting x = -10 and y = -10

Math:

4x - 3y = -10

4(-10) - 3(-10) = -10

-40 - -30 = -10

-40 + 30 = -10

-10 = -10 (CHECK)

 

English:Write Answer

In the equation 4x - 3y = -10 when y = -10, x = -10 or (-10,-10)

 

     

 

 

 

Answer 2

4x - 3y = -10

y = -10

 

4x -3(-10) = -10

4x + 30 = -10

4x = -40

x = -10