<|system|>
The equations $2x+7=3$ and $bx-10=-2$ have the same solution $x$. What is the value of $b$?</s>.
<|user|>
Can you answer based on context?
<|assistant|>
Since $2x+7=3$ we have $x=-2$. Hence $$-2 = bx - 10 = -2b-10, \quad \text{so} \quad 2b = -8, \ \text{and } b = -4.$$