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3x+1 -7(1-2x) = 28
3x+1-7+14x = 28
3x+14x = -1+7+28
17 x. = 34
x. = 2. ( B )
5. 2x-5<_3x-13
2x-3x <_ 5-13
-x. <_ -8
x. >_ 8. ( A )