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7 February, 18:06

What is the reason for each proof?

Given: 3x - 4 = 2 (x + 8), Prove: x = 20

(1) 3x - 4 = 2 (x + 8)

(2) 3x - 4 = 2x + 16

(3) 3x = 2x + 20

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Answers (1)
  1. 7 February, 18:35
    0
    Step-by-step explanation:

    We have given the expression:

    3x - 4 = 2 (x + 8)

    Now multiply the R. H. S

    3x-4 = 2x+16 (Distributive property)

    Add 4 to both sides:

    3x-4+4=2x+16+4

    3x = 2x+20 (Addition property of equality)

    Subtract 2x from both sides:

    3x-2x = 2x-2x+20

    x=20 (Subtraction property of equality) ...
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