### Home > CCA > Chapter 1 > Lesson 1.2.2 > Problem1-49

1-49.

Throughout this book, key problems have been selected as “checkpoints.” Each checkpoint problem is marked with an icon like the one at right. These checkpoint problems are provided so that you can check to be sure you are building skills at the expected level. When you have trouble with checkpoint problems, refer to the review materials and practice problems that are available in the “Checkpoint Materials” section at the back of your book.

This problem is a checkpoint for solving linear equations without parentheses. It will be referred to as Checkpoint 1.

Solve each equation.

1. $3x+7=−x−1$

1. $1−2x+5=4x−3$

1. $4x−2+x=−2+2x$

1. $3x−4+1=−2x−5+5x$