### Home > CCA > Chapter 1 > Lesson 1.1.3 > Problem1-28

1-28.

Solve the equations below for $x$ and check your solutions.

1. $−3+2x=−x+6$

Add $3$ to both sides.

$−3+2x=−x+6$
$+3\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ +3$
$2x=−x+9$

Add $x$ to both sides.

$2x=−x+9$
$+x\ \ \ \ +x$
$3x=9$

Divide both sides by $3$.

$\frac{3\textit{x}}{3}=\frac{9}{3}$

$x=3$

Substitute $3$ back into the original equation.
$−3+2(3)=−(3)+6$
$−3+6=−3+6$
$−3=−3$

It works!

1. $5−3x=x+1$

Refer to part (a).

$x=1$

1. $−2x=4x+9$

$x=−1.5$

1. $4x+3=x$

Use the same method as parts (a), (b), and (c). Make sure to check your answer as shown in part (a).
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