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a) -11m + 11n + 10
b) 4a - 5b + 13d
no. 2
a) -5m + 3n + 10
b) -26a - 19b + 13d
no. 3
12x - 8y - 10z + 10
= -3m+7n+4n-6+10
= -5m+4n+7n-6+10
b.15a+7b-5c dengan -11a-12b+13d
=15a+(-11a+(7b-12b)+13d+5c
=4a+19b+13d+5c
2.a.-3m+4n-6 dengan 7n - 8m +10
=-3m+(-8m)+4n+10
=11m+11n
b.15a + 7b dengan -11a - 12b + 13d
=15a+-11a-7b-12b+13d+5c
=26a- -b+13d+5c
3.( 5x - 6y + 8z ) + ( 7x - 9z ) - ( 2y + 9z - 10 )
=5x-6y+8z + 7x-9z-2y+9z+10
=5x+7-6y-8z+10
=12x-8y+8z+10