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Verified answer
1)A = { 2, 3, 5, 7, 11, 13 }
B = { 3, 5, 7, 9, 11, 13 }
A ∩ B = { 3, 5, 7, 11, 13 }
3)
11)
4(3x - 3)
= 12x - 12
12)
5xy + 5yz + z + 3xy - 2yz + 10z
= (5xy + 3xy) + (5yz - 2yz) + (z + 10z)
= 8xy + 3xy + 11z
13)
3(p - 2) - 5p + 6
= 3p - 6 - 5p + 6
= (3p - 5p) + (-6 + 6)
= -2p
14)
15)
16)
17)
18)
3(3x + 5) - 5(7x - 3) = x + 7
9x + 15 - 35x + 15 = x + 7
-26x + 30 = x + 7
-26x - x = 7 - 30
-27 = -23
19)
20)
21)
22)
25)
5x + 18 = 6 + 2x
5x - 2x = 6 - 18
3x = -12 (bagi kedua sisi dengan 3)
x = -4