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28 November, 20:15

Find the missing coordinate to complete the ordered-pair solution to the given linear equation:

A) y+6x=5

(a) (-1,?)

(b) (3,?)

B) 3x+2y=-6

(a) (-2,?)

(b) (?,3)

C) 2x+1/3y=5

(a) (?,18)

(b) (8/3,?)

+4
Answers (1)
  1. 29 November, 00:13
    0
    A

    a) y+6x=5 if x = - 1 then y+6 (-1) = 5 then y = 11

    b) same thing if x = 3 then y+6 (3) = 5 y+18=5 subtract both sides by - 18 and leave y on left then add 5 + (-18) = 13 then y=13

    B same as above

    question (a) asks you to solve for y because x is - 2

    (b) asks you to solve for x because y is known

    3x+2y=-6 if y = 3 you write 3x+2 (3) = - 6 3x+6=-6 move the + 6 over to right side by subtracting 6 from both side 3x=-6 + - 6 so 3x=-12 to get rid of the 3 and only leave the x you want to divide both side by 3 then x = - 12/3 then the answer would be x=-4
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