3x - 3y = -30
-2x + 7y = -2

(this is elimination)

Step-by-step explanation:

-3x - 3y = -30

-2x + 7y = -2

-3x - 3y = -30  /*(-2)

-2x + 7y = -2 /*3

6x + 6y = 60

-6x + 21y = -6

6x - 6x + 6y + 21y = 60  - 6

27y = 54

y = 2

-3x - 3y = -30

-3x - 3*2 = -30

-3x - 6 = -30

-3x = -30 + 6

-3x = - 24 / : (-3)

x = 8

step-by-step explanation: you take each of the numbers and divide by the amount then you take the range

452,489 to the nearest thousand is 452,000