Any number between $-6$ and $7$.
Work Step by Step
Given: $3x \lt 4x +6$ and $2x+1 \lt15$ $-x \lt 6$ and $2x \lt 14$ $x \gt -6$ and $x\lt7$ $-6 \lt x \lt 7$ Any number between $-6$ and $7$ makes both inequalities true.
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