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13a +12a -8b +9b
25a +b
2. (15i +14b +13k) +(-30i -45 j +51k)
15i +14b +13k -30i -45j +51k
15i -30i +14b +13k +51k -45j
-15i +14b +64k -45j
3. (3 -17x +35z) +(4x +23y -9)
3-17x +35z +4x +23y -9
-17x +4x +35z +23y +3 -9
-13x +35z +23y -6
4. (42n +35m +7) -(50m -20n +9)
42n +35m +7 -50m +20n -9
42n +20n +35m -50m +7 -9
62n -15m -2
5. dibalik dahulu
(x-1) -(5x +3)
x -1 -5x -3
x -5x -1 -3
-4x -4
6. dibalik dahulu
(2y +15z) -(4y -8)
2y +15z -4y +8
2y -4y +15z +8
-2y +15z +8
7. dibalik dahulu
(2z -7) -(5z +3)
2z -7 -5z -3
2z -5z -7 -3
-3z -10
8. dibalik dahulu
(x -y) -(6x +4)
x -y -6x -4
x -6x -y -4
-5x -y -4
maaf kelamaan