3x - 1 = 20
3x = 21
x = 7
Your answer is D) 7.
The first thing we must do for this case is to define variables.
We have then:
x: weight of the big box
y: weight of the small box.
We now write the system of equations that models the problem:

We apply the graphic solution.
For this, the solution will be the cut point of both lines.
We have then that the solution occurs for the point:
Note: see attached image
Answer:
Weight of each large box: 15.5 Kilograms
Weight of each small box: 13.25 Kilograms
Answer:
12/3 = 8/x
x=2
Step-by-step explanation:
<em> a₁ is the first term, d is the difference, and n is the term</em>
a₁ = -5
d = -5

<em>explicit formula</em>
<em>recursive formula</em>