Answer:

Step-by-step explanation:
Let's translate what you've written in words to an expression with mathematical symbols.

To solve this, you need to multiply both the numerator and denominator with the conjugate of the denominator.

Answer:
en español por qué no entiendo tu pregunta porfa
Answer:
x =
, y = 6
Step-by-step explanation:
5x + y = 7 → (1)
20x + 2 = y → (2)
Substitute y = 20x + 2 into (1)
5x + 20x + 2 = 7
25x + 2 = 7 ( subtract 2 from both sides )
25x = 5 ( divide both sides by 25 )
x =
= 
Substitute this value into (2) and evaluate
20(
) + 2 = y
4 + 2 = y , so
y = 6
1) Let's convert it to kilometers, using for that a Rule of three
1 mile ---------- 1.600 km
3 -----------------x
2) Multiplying it crossed
3*1.600=1x
4800=x
x = 48