What is the x-coordinate of the solution to the following system of equations? 2x + y = −4 5x + 3y = −6 x = −6 x = 6 x = −8 x = 8 please show work, I really don't understand this.

x=-6

Step-by-step explanation:

2x+y=-4

5x+3y=-6

solve :

multiply first equation by 3

6x+3y=-12

5x+3y=-6

subtract the two equations : 6x+3y-5x-3y=-12-(-6)

x=-12+6

x=-6

x= -6

Step-by-step explanation:

2x + y = −4 ⇒ y= -2x -4

5x + 3y = −6  

replacing y with -2x-4

answer: 1.06 km per sec

step-by-step explanation:

39.6 m=63.72 km

60 min in an hour so 63.72/60=1.06