If a = b then a + b cannot possibly equal b unless both a & b = 0, which defeats the purpose of the entire equation. If you plug in any possible value besides 0, the equation disproves itself.
Solution:
Let the volume (in litres) of acids used be:
x1=amount of 25% acid
x2=amount of 40% acid
x3=3*x2=amount of 60% acid
Answer:
<h2>6 feet</h2>
Step-by-step explanation:
3 x 2 = 6
You're on the right track. After you get both equations you need to cancel one of the variables. In this situation, it doesn't matter which variable you cancel out.
2x+30=20x-70
Combine like terms.
100=18x
Divide to get your answer.
100/18 or 5.5
-TTL