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13x+ 7 = 5x-8
13x - 5x = -8 -7
8 x = - 15
x = -15/8
6x - 5 = 6(-15/8) - 5
= -90/8 - 5
= -90/8 - 40/8
= - 130 /8
13x - 5x = -8 - 7
8x = -15
x = -15/8
Jadi, nilai x adalah -15/8
6x - 5 = 6(-15/8) - 5
= -90/8 - 5
= -90/8 - 40/8
= -130/8