The system of equations 3x + 9y^3= -21, 13y^3+4x=-1 has exactly one solution. Use substitution to find the solution.

What is the solution?

Enter your answer as an ordered pair, like this: (42, 53)

Step-by-step explanation:

 -------------------------- (1)

 -------------------------- (2)

Multiply Eq. (1) by 13 and (2) by 9

Equation (1):

--------------------(3)

Equation (2):

------------------------(4)

Subtract Eq. (2) from (1)

39x - 36x = -264

3x = -264

Dividing both sides by 3

x = -88

Put x = -88 in Eq. (1)

3(-88)+9y³ = -21

-264 + 9y³ = -21

9y³ = -21 + 264

9y³ = 243

Dividing both sides by 9

y³ = 27

Taking cube root on both sides

y = 3

Ordered Pair = (x,y) = (-88,3)

Hope this helped!

i think it is c, not positive though

step-by-step explanation:

answer: answer is c!

ok i got to organize the

3/15 and 12/55

3*

aha

3*4 equals 12 but not

a: no

b:

8/24 12/35

no

gautie

it's c

5/18 = 25/90

5*5=25

18*5 = 90

hope that you!

one more happy customer!

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step-by-step explanation: