4(x - 3) - r + 2x = 5(3x - 7) - 9x
4x - 12 - r + 2x = 15x - 35 - 9x
6x - 12 - r = 6x - 35
6x - 6x - 12 + 35 = r
23 = r <==
with ur answer : -r = -23....u would multiply both sides by -1 to make r positive....resulting in : r = 23....so u basically got the same thing I did...just didn't quite finish
Since the triangles are similar, we can use ratios to find what x equals.
Ratios:
3x+8/4 = 25/5
The easiest way to solve ratios, in my opinion is to cross multiply.
3x+8*5 = 4*25. Simplify to get 15x + 40 = 100.
Subtract 40 on both sides. 15x = 60.
Divide 15 on both sides. x = 4.
Answer: 3 hours and 18 minutes.
Step-by-step explanation:
