Question

It takes 43 facial muscles to frown. This is 26 more muscles than it takes to smile. Write and solve an equation to find the number of muscles it takes to smile. (example: s + 1 = 4)

Answer 1

By setting up the equation s + 26 = 43, we find out it takes 17 muscles to smile when subtracting 26 from both sides.

Step-by-step explanation:

To find the number of muscles it takes to smile, we can set up an equation based on the information provided. If frowning uses 43 muscles and it takes 26 fewer muscles to smile, we can denote the number of muscles it takes to smile as s. The equation is:

s + 26 = 43

To solve for s, we subtract 26 from both sides of the equation:

s = 43 - 26

s = 17

Therefore, it takes 17 muscles to smile.

Answer 2

Number of facial muscles it takes to smile, S = 20

Step-by-step explanation:

Let

Number of facial muscles it takes to smile = S

Number of facial muscles it takes to frown, F = 46

This is 26 more muscles than it takes to smile

F = S + 26

46 = S + 26

Subtract 26 from both sides

46 - 26 = S + 26 - 26

20 = S

S = 20

The number of muscles it takes to smile is 20