Hi

solving 4x+3y=13 for y when x = -2

The idea is to substitute that value for x and isolate y on one side of the equation

4x + 3y = 13

4*(-2) + 3y = 13   |substituting -2 for x

  -8 + 3y = 13     | completing the multiplication 4*(-2)

       3y = 21     |adding 8 to both sides of the equation

        y = 7      | dividing both sides of the equation by 3



CHECKING our Answer

 - 8 + 21  = 13 

RELATED QUESTIONS

Please help me?

Solve 2/5x - 6 = 12

Solve by addition 5x - 3y = 13
                 (answered by bucky)

Please help me solve 
x - 3y = -13
-x + 4y =... (answered by lynnlo)

please help me solve this is what I got 5x-3y=13
4x-3y=11 My answer is x=3 and y =1 I do  (answered by funmath)

Please help me with the following: 

Solve by substitution x + y = 12
                  (answered by johnnico6426)

Please help me solve this linear equation: 
(x-9)^2+y^2=25
4x-3y=61  (answered by Alan3354)

Solve the system by addition.	5x – 3y = 13	4x – 3y = 11

The sum of two numbers is 90.   (answered by aaaaaaaa)

Please help me solve... (answered by checkley75)

please help me solve,... (answered by dave41082)

Please help me solve this x^2-4x(-4)=... (answered by jim_thompson5910)