Zoe is solving the equation [tex]$3x - 4 = -10$[/tex] for [tex]$x$[/tex].

She used the addition property of equality to isolate the variable term as shown:

[tex]\[
\begin{aligned}
3x - 4 & = -10 \\
3x - 4 + 4 & = -10 + 4 \\
3x & = -6
\end{aligned}
\][/tex]

Which two properties of equality could Zoe use to finish solving for [tex]$x$[/tex]?

A. either the addition or subtraction property of equality
B. either the multiplication or division property of equality
C. either the addition or multiplication property of equality
D. either the subtraction or division property of equality



Answer :

To solve the given equation [tex]\( 3x - 4 = -10 \)[/tex] for [tex]\( x \)[/tex], Zoe has already used the addition property of equality to isolate the variable term, resulting in [tex]\( 3x = -6 \)[/tex].

To finish solving for [tex]\( x \)[/tex], Zoe can use the following properties of equality:

1. Multiplication property of equality: This property states that if [tex]\(a = b\)[/tex], then [tex]\(a \cdot c = b \cdot c\)[/tex] for any number [tex]\(c\)[/tex]. In this context, [tex]\( 3x = -6 \)[/tex] can be solved by multiplying both sides by [tex]\(\frac{1}{3}\)[/tex], which is the same as dividing both sides by 3.

2. Division property of equality: This property states that if [tex]\(a = b\)[/tex], then [tex]\(\frac{a}{c} = \frac{b}{c}\)[/tex] for any nonzero number [tex]\(c\)[/tex]. Here, [tex]\( 3x = -6 \)[/tex] can be solved by dividing both sides by 3.

Thus, the two properties of equality that Zoe could use to finish solving for [tex]\( x \)[/tex] are:
1. Multiplication property of equality
2. Division property of equality