3 years ago

An equilateral triangle has a perimeter of 21 and a side length of 2x - 3. Solve for x

Mathematics

1 answer:

scoray [572]3 years ago

4 0

Answer:

x=3

Step-by-step explanation:

Because it is equilateral, all the sides are equal. so you can make your equation

3(2x-3)=21

Distribute the 3 throughout, giving you 6x-3=21

Subtract the 3 from both sides, and you are left with 6x=18

Divide 18 by 6 and you get 3.

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Answer:

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Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

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