ACT 2019 April(Z15) Math Question 12 Explanation - ACT Helper

Pricing | Login

2019 April(Z15) Math Question 12
Word Problems
- 2 Variable Addition
Choice F
$$ 5 b i l l : x$ $$ 10 b i l l : y$ $5 x + 10 y = 205 - - - (1)$ $x + y = 27 - - - (2)$ $(1) - (2) \times 5$ $\Rightarrow (5 x + 10 y) - (5 x + 5 y) = 205 - 27 \times 5$ $\Rightarrow 5 y = 70$ $\Rightarrow y = 14$ $\Rightarrow x = 13$
Skills you are tested for:
Was this explanation helpful?
Add your comment
Your mood
Thanks for your feedback! ❤️

Comments

To leave a comment,