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27-02-2021
Mathematics

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What is the length of side AC of the triangle?

Enter your answer in the box.

[ ] units

What is the length of side AC of the triangle Enter your answer in the box units class=

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jimrgrant1 jimrgrant1

27-02-2021

Answer:

AC = 25 units

Step-by-step explanation:

Given ∠ A = ∠ C then the triangle is isosceles and BC = AB , that is

7x - 1 = 5x + 5 ( subtract 5x from both sides )

2x - 1 = 5 ( add 1 to both sides )

2x = 6 ( divide both sides by 2 )

x = 3

Then

AC = 6x + 7 = 6(3) + 7 = 18 + 7 = 25 units

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