CPM Homework Help : AC Problem 3-73

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Home > AC > Chapter 3 > Lesson 3.2.1 > Problem 3-73

3-73.

For the following equations, solve for $x$ . Be sure to check your answer, if possible. Show all work.

$3x+7=-x-1$
Hint (a):
Subtract $7$ from both sides.
$3x+7=-x-1$
$-7-7$
More Help (a):
Get the variable on a side by itself.
$3x=-x-8$
$+x+x$
$4x=-8$
Answer (a):
$x=-2$

$1-2x-5=4x+2$
Hint (b):
Follow the steps in part (a).

$\ -3x=x-(6-2x)$
Hint (c):
Follow the steps in part (a).
More Help (c):
How does the negative sign in front of the parentheses change what is inside?

$2x+3=-2x+5$
Hint (d):
Follow the steps in part (a).
Answer (d):
$x=0.5$

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