Question

Solve the system of linear equations below.


4x - 3y = 17
5x + 4y = 60

Answer 1

what happens when you add those two equations?

Answer 2

yu tell me

Answer 3

4x - 3y = 17 ---> Equation 1
5x + 4y = 60 ---> Equation 2

4(equation 1) + 3(equation 2)

4(4x-3y) = 4(17)
+3(5x+4y)=3(60)
-----------------------------------
(16+15)x + (-12 +12)y = (17)(4)+3(60)
31 x + 0 = 68 + 180
31 x = 248
x = 248 /31 = 8

Now subsitute x= 8 in either equation 1 or 2 to get your y value

4(8) - 3 y =17
32 - 3y =17
32-17 = + 3y
y = 15/3 = 5