1) 2x+8y=20

y=2

2x+8 (2) = 20

2) x=5

2x+y=10

2 (5) + y=10

3) 5x-2y=3

y=2x

5x-2 (2x) = 3

4) 2y+x=-15

x=3y

2y + (3x) = - 15

5) 4x+7y=19

y=x+9

4x+7 (x+9) = 19

6) y=6x+11

2y-4x+14

2 (6x+11) - 4x+14

7) 2x-8y=6

y=-7-x

2x-8 (-7-x) = 6

8) x=2y-1

3x-2y=-3

3 (2y-1) - 2y=-3

what is the process and what x and y equal

Question

Mathematics

Michelle Carr

13 April, 15:49

1) 2x+8y=20

y=2

2x+8 (2) = 20

2) x=5

2x+y=10

2 (5) + y=10

3) 5x-2y=3

y=2x

5x-2 (2x) = 3

4) 2y+x=-15

x=3y

2y + (3x) = - 15

5) 4x+7y=19

y=x+9

4x+7 (x+9) = 19

6) y=6x+11

2y-4x+14

2 (6x+11) - 4x+14

7) 2x-8y=6

y=-7-x

2x-8 (-7-x) = 6

8) x=2y-1

3x-2y=-3

3 (2y-1) - 2y=-3

what is the process and what x and y equal

+4

Answers (1)

Know the Answer?

Marlee · Answer 1

If they give you what one variable is, you can plug it into the equation and use algebra to solve it. So:

1) 2x=4 - > 4/2 = 2 so x=2

2) y=0

3) x=3

4) 2y + (3*3y) = - 15

11y=-15

y = - 15/11

5) 4x + 7x + 63 = 19

11x = - 44

x = - 4

1) 2x+8y=20y=22x+8 (2) = 202) x=52x+y=102 (5) + y=103) 5x-2y=3y=2x5x-2 (2x) = 34) 2y+x=-15x=3y2y + (3x) = - 155) 4x+7y=19y=x+94x+7 (x+9) = 196) y=6x+112y-4x+142 (6x+11) - 4x+147) 2x-8y=6y=-7-x2x-8 (-7-x) = 68) x=2y-13x-2y=-33 (2y-1) - 2y=-3what is the process and what x and y equal