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5x -8x = 7 +8
-3x = 15
x = 15/-3
x = -5
Maka, nilai :
x +6
= -5 +6
= 1
Jadi, jawabannya adalah b.
5x - 5x - 8 -7 = 8x - 5x + 7-7
-15 = 3x
-15/3 = x
-5 = x
x+6
-5 + 6
=1
maka B