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2) ( B )30 + 6x = 12
6x = 12 - 30
6x = -18 (bagi kedua sisi dengan 6)
x = -3 ( B )
3) ( C )
-2x = 6 (bagi kedua sisi dengan -2)
x = -3
a) x = -3
b)
2x + 6 = 0
2x = -6
x = -3
c)
4x = 12
x = 3 ( tidak ekuivalen )
Jadi, jawabannya adalah C
4) ( C )
4x + 18 = 6 - 2x
4x + 2x = 6 - 18
6x = -12
x = -2 ( C )
5)
4(2y - 3) = 4y + 10
8y - 12 = 4y + 10
8y - 4y = 10 + 12
4y = 22
Jawabannya ( A )
6) ( C )
4(2y + 3) - 2y = 3(4y + 3)
8y + 12 - 2 y = 12y + 9
6y + 12 = 12y + 9
6y - 12y = 9 - 12
-6y = -3
Jadi, jawabannya ( C )
7) ( D )
3(2x - 5) + 2(4x + 7) = 5(3x + 1)
6x - 15 + 8x + 14 = 15x + 5
14x - 1 = 15x + 5
14x - 15x = 5 + 1
-x = 6
x = -6 ( D )
8) ( D )
9) ( B )
10) ( D )