Solve the following system of equations using gaussian elimination

6x+2y-4z=15

-3x+4y+2z=-6

4x-6y+3z=8

i am having trouble solving these and i really need because i don't understand how to do problems like this. you so much

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000