Question

Step by step linear combination. 3x+2y=-4 4x-y=13

Answer 1

Answer:

The solution is the point (2,-5)

Step-by-step explanation:

we have

$3x+2y=-4$ ------> equation A

$4x-y=13$ ------> equation B

Multiply equation B by 2 both sides

$2(4x-y)=2*13$

$8x-2y=26$ ------> equation C

Adds equation A and equation C

$3x+2y=-4\\8x-2y=26\\---------\\3x+8x=-4+26\\11x=22\\x=2$

Find the value of y

substitute the value of x in equation A

$3(2)+2y=-4$

$2y=-4-6$

$2y=-10$  

$y=-5$  

The solution is the point (2,-5)