Question

Write the equation based on the picture and calculate the mass of the unknown package.

Answer 1

5x + 4 = 4x + 7

x = 3

Explanation:

Let's call the mass of the unknown package "x". The equation is:

2+2 + x+x+x+x+x = x+x+x+x + 2+5

5x + 4 = 4x + 7

Now let's solve for x

5x + 4 = 4x + 7

x + 4 = 7

x = 3

Answer 2

Explanation:

5x + 2 = 4 x + 7

x = 5