Question

1. solve $x - 7 = 10$. $x = 70$; $x = 0.7$; $x = 3$; $x = 17$

Explanation:

Step1: Isolate the variable \( x \)

To solve for \( x \) in the equation \( x - 7 = 10 \), we need to isolate \( x \). We can do this by adding 7 to both sides of the equation. This is based on the addition property of equality, which states that if we add the same number to both sides of an equation, the equation remains true.
\[
x - 7 + 7 = 10 + 7
\]

Step2: Simplify both sides

Simplifying the left side, \( -7 + 7 = 0 \), so we are left with \( x \). Simplifying the right side, \( 10 + 7 = 17 \). So we have:
\[
x = 17
\]

Answer:

\( x = 17 \) (corresponding to the option: \( x = 17 \))