(9x+11y=22) (7x+4y=-33)

x = -11.

y = 11.

Step-by-step explanation:

9x + 11y =  22

7x + 4y  = -33

Multiply the first equation by -4 and the second by 11:

-36x -  44y = -88

77x  +  44y =  -363     Adding these 2 equations:

41x = -451

x = -451 / 41

x = -11.

Now plug x = -11 into the first equation

9(-11) + 11y = 22

-99 + 11y = 22

11y = 22 + 99

11y = 121

y = 11.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

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