17x + 4x + 15y - 5y
= (17x + 4x) + (15y - 5y)
= (17 + 4)x + (15 - 5)y
=> 21x + 10y
17x + 4x + 15 - 5y
(17 + 4)x + (15 - 5)y
21x + 10y
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17x + 4x + 15y - 5y
= (17x + 4x) + (15y - 5y)
= (17 + 4)x + (15 - 5)y
=> 21x + 10y
» Penyelesaian
17x + 4x + 15 - 5y
(17 + 4)x + (15 - 5)y
21x + 10y