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b. 2(4p+q)-(5p-3q)= (8p+2q)-(5p-3q)= 3p+5q
= 4m - 3n - (3m - 7n)
= 4m - 3n - 3m + 7n
= m + 4n
b) 5p - 3q dari 2(4p + q)
= 2(4p + q) - (5p - 3q)
= 8p + 2q - 5p + 3q
= 3p + 5q
c) -2a + 4b dari 7a - 2b
= 7a - 2b - (-2a + 4b)
= 7a - 2b + 2a - 4b
= 9a - 6b
d) 3(2x + 3y) dari 2(x - 7y)
= 2(x - 7y) - {3(2x + 3y)}
= 2x - 14y - 6x - 9y
= -4x - 23y