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⇔
⇔
⇔ 3. (3x-6) = 2 .( 4x-6)
⇔ 9x-18 = 8x-12
⇔9x-8x = 18-12
⇔ x = 6
HP = { 6}
2.
⇒
⇒ 7b = 2. 13
⇒ 7b = 26
⇒ b =