Example 1: Find the answers to the equation 2x - 5 = 8 to make the equation 2x - 5 = 8 to 2x - 5 + 5 = 8 + 5 (take five to plus two) x + 7 = 9. Has x + 7 - 7 = 9 - 7 (-7 lead to both positive) 3x = 15 1/3. 3x = 15. 1/3 (1/3, leading to multiply both sides) (1) x. = 5 x = 5, that is, x = 5.
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