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18 August, 14:53

Solve.

2x + 6 - 7x = 21

+2
Answers (2)
  1. 18 August, 15:47
    0
    -7x + 2x (add common factors)

    -5x+6+21 (what happen to one side happens to the others

    -5x=21 (divide by five)

    x = - 3
  2. 18 August, 17:12
    0
    Combine like terms, 2x + - 7x = - 5x.

    Now you have - 5x + 6 = 21.

    subtract 6 from both 6 and 21, the 6 cancels out and 21-6=15.

    You’re left with - 5x=15

    Divide 5 on both sides, - 5 cancels out, and you’re left with

    x=-3

    sorry this was messy and i hope this made sense!
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