Answer :

Sure, let's solve each part of the question step by step.

1. Equation: [tex]\( 7 - x = 5 \)[/tex]

To solve for [tex]\( x \)[/tex], we follow these steps:

- Subtract 7 from both sides:
[tex]\[
7 - x = 5 \implies -x = 5 - 7
\][/tex]
- Simplify the right side:
[tex]\[
-x = -2
\][/tex]
- Multiply both sides by -1 to solve for [tex]\( x \)[/tex]:
[tex]\[
x = 2
\][/tex]

So, the solution to the first equation is [tex]\( x = 2 \)[/tex].

2. Equation: [tex]\( 9 - 7 = 5 \)[/tex]

Let's check this statement. If we subtract 7 from 9:
[tex]\[
9 - 7 = 2
\][/tex]

The original statement said [tex]\( 9 - 7 = 5 \)[/tex], which is incorrect. Instead, 9 minus 5 would equal 4, if that was the intended logic.

3. Expression: [tex]\( 8: 5 - 2 = 1.8 \)[/tex]

It seems like this expression means to divide 8 by the result of [tex]\( 5 - 2 \)[/tex]. Let's solve it:

- First, solve [tex]\( 5 - 2 \)[/tex]:
[tex]\[
5 - 2 = 3
\][/tex]
- Divide 8 by the result:
[tex]\[
\frac{8}{3} \approx 2.6667
\][/tex]

So, the result of this expression is approximately 2.6667.

In summary, for the given equations and expressions, we have:
- [tex]\( x = 2 \)[/tex] for the first equation.
- The second equation has an incorrect statement.
- The third expression evaluates to approximately 2.6667.

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