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Matematika SMP Kelas VII
a] 2x + 3(y - x)
= 2x + 3y - 3x
= -x + 3y
b] 3p - 5(-p + k)
= 3p + 5p - 5k
= 8p - 5k
c] 2a - 4(a - b)
= 2a - 4a + 4b
= - 2a + 4b
d] -4 (a + b) - 3 (2a + b)
= -4a - 4b - 6a - 3b
= -10a - 7b