The length of each side of an equilateral triangle is increased by 5 inches, so, the perimeter is now 60 inches. How do you write and solve an equation to find the original length of each side of the equilateral triangle?

Answer 1

I found:#15"in"#

Let us call the original lengths #x#:
will give us:
#(x+5)+(x+5)+(x+5)=60#
#3(x+5)=60#
rearranging:
#x+5=60/3#
#x+5=20#
#x=20-5#
#x=15"in"#

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Answer 2

Genesis Allen

Let ( x ) represent the original length of each side of the equilateral triangle. The equation to find the original length is ( x + 5 + x + 5 + x + 5 = 60 ). Solve for ( x ) by simplifying and solving the equation.

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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.