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Is 40, –40, 16, or –16 the solution of the equation 28=d−12?

User Benteh
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Answer:

To check whether 40, -40, 16, or -16 is the solution of the equation 28 = d - 12, we can substitute each value into the equation and see if it results in a true statement.

When we substitute 40 into the equation, we get:

28 = 40 - 12

Simplifying, we get:

28 = 28

This is a true statement, so 40 is a solution of the equation.

When we substitute -40 into the equation, we get:

28 = -40 - 12

Simplifying, we get:

28 = -52

This is not a true statement, so -40 is not a solution of the equation.

When we substitute 16 into the equation, we get:

28 = 16 - 12

Simplifying, we get:

28 = 4

This is not a true statement, so 16 is not a solution of the equation.

When we substitute -16 into the equation, we get:

28 = -16 - 12

Simplifying, we get:

28 = -28

This is not a true statement, so -16 is not a solution of the equation.

Therefore, the only solution of the equation 28 = d - 12 is d = 40.

User Fabry
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