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3x + 2y = 17 ⇒ x 3 ⇒ 9x + 6y = 51 -
-5x = -15
x = -15
- 5
x = 3
jadi,y = 2x + 3y = 18
2 . 3 + 3y = 18
6 + 3y = 18
3y = 18 - 6
3y = 12
y = 12
3
y = 4