Question

Elimination???

Select the best possible first step to solving the system by first eliminating the y variable.

4x - 5y = 4
3x + 2y = -20

Multiply the first equation by -2 and multiply the second equation by 5. (i think)

Multiply the first equation by 2 and multiply the second equation by -5.

Multiply the first equation by 2 and multiply the second equation by 5.

None of the above

Answer 1

X= -4, Y=-4 (-4,-4)

Answer 2

4x - 5y = 4 (2)
3x + 2y = -20 (5)

8x -10y =8
12 x + 10 y =-100
Can you change your mind now since adding these equations
will get rid of the y

Answer 3

// Solve equation [2] for the variable y

[2] 2y = -3x - 20

[2] y = -3x/2 - 10

// Plug this in for variable "y" in equation [1]

[1] 4x - 5•(-3x/2-10) = 4


[1] 23x/2 = -46

[1] 23x = -92

// Solve equation [1] for the variable x

[1] 23x = - 92

[1] x = - 4

By now we know this much :

x = -4
y = -3x/2-10

// Use the x-value to solve for y

y = -(3/2)(-4)10 = -4

Answer 4

Your choice is the third one.

Answer 5

Hope this helps! :D

Answer 6

They are not asking to solve the problem. They are asking the first step used to eliminate y