Algebra

1.
7r – 7 = 2r + 18 (1 point)

r = –5
r = 5
r = 2.2
r = 1.2

2.
2x + 12 = 18 – x (1 point)

x = 3
x = 10
x = 6
x = 2

3.
8x – 3 = 15x + 18 (1 point)

x = –3
x = 3
x = 2.1
x = .9

4.
6y – 6 = 4y + 16 (1 point)

y = 2.2
y = –2.2
y = 11
y = 5

5.
3(x – 4) = 5(x + 2) (1 point)

x = 11
x = –11
x = 1
x = –1


What I chose
1.2
2
.9
2.2
1

If I'm wrong please explain how to do this

  1. 0
  2. 5
asked by Baby_Banana
  1. 1.2 - no
    2 - yes
    .9 - no
    2.2 - no
    1 - no

    Here's how to do the first one.

    7r – 7 = 2r + 18

    Subtract 2r from both sides.
    5r - 7 = 18

    Add 7 to both sides.
    5r = 25

    Divide both sides by 5.
    r = 5

    Do the others the same way.

    1. 0
    posted by Ms. Sue
  2. Thank you, Ms.Sue!

    1. 0
    posted by Baby_Banana
  3. You're welcome Baby_Banana.

    1. 0
    posted by Ms. Sue

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