Answer:
29/7
Explanation:
10-5x=3(x-4)-(x+7)
10-5x=3x-12-x-7
10-5x=3x-x-12-7
10-5x=2x-19
10-5x-2x=-19
10-7x=-19
7x=10-(-19)
7x=10+19
7x=29
x=29/7
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