Chapter 1 - Foundations for Algebra - 1-8 An Introduction to Equations - Practice and Problem-Solving Exercises - Page 57: 50

$-3d+(-4)=2$ $-3(-2)+(-4)\overset?=2$ $6+(-4)\overset?=2$ $2=2\checkmark$

$-3d+(-4)=2$ $-3(-2)+(-4)\overset?=2$ $\underset\uparrow{-6}+(-4)\overset?=2\longrightarrow$The error is in multiplying $-3(-2)$. The product should be positive. $-10\ne2\ \ X$