8. \( 0.03 x+0.1=0.7 \)

Let's solve the equation step by step: First, we can isolate the variable \( x \) by subtracting 0.1 from both sides. This gives us: \( 0.03x = 0.7 - 0.1 \) That simplifies to: \( 0.03x = 0.6 \) Next, we divide both sides by 0.03 to solve for \( x \): \( x = \frac{0.6}{0.03} \) Calculating that yields: \( x = 20 \) So, the solution to the equation \( 0.03x + 0.1 = 0.7 \) is \( x = 20 \)!