Question

Find x if AC = 7x - 15 and BD = 4x + 15

Answer 1

x = 10

Explanation:

Given that AC and BD are congruent , then

7x - 15 = 4x + 15 ( subtract 4x from both sides )

3x - 15 = 15 ( add 15 to both sides )

3x = 30 ( divide both sides by 3 )

x = 10

Answer 2

x = 10

Explanation:

7x - 15 = 4x + 15

7x - 4x = 15 + 15

3x = 30

x = 10