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Question
19x + 13 -12x + 3 = 23
Solution
19x + 13 -12x + 3 = 23
⇒ 19x - 12x = 23 - 13 - 3
⇒ 7x = 23 - 16 = 7
⇒ x = `7/7 = 1`
∴ x = 1
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