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⇒ 6x - 2y
2. 4x + 4y + 3x - 3y
⇒ 4x + 3x + 4y - 3y
⇒ 7x + y
3. 2x - 2y + 3x + 3y
⇒ 2x + 3x - 2y + 3y
⇒ 5x + y
4. 9y² + 9y + 8y² - 8y
⇒ 9y² + 8y² + 9y - 8y
⇒ 17y² + y
Semoga membantu:)
2.4x+4y+3x-3y=4x+3x+4y-3y
=7x+y
3.2x-2y+3x+3y=2x+3x-2y+3y
=5x+y
4.9y2+9y+8y2-8y=9y2+8y2+9y-8y
=17y2+y