Three more than a number is -5. How do you find the number?

Answer 1

#x=-8#

Examples like these are the first steps in learning how to solve problems by making and and solving an algebraic equation.

"Three more than" means 3 added to some number.

In this case, let "the number" be #x#

"Three more than a number" is written as #x +3#

"is -5" tells us the answer. It means something #= -5#

Put all this together ....

#x+3 = -5" "larr# now solve the equation

Subtract 3 from both sides

#x+3 color(red)(-3) = -5 color(red)(-3)#

#x = -8#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Genesis Allen

The number is -8.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.