Question

Given the drawing. What would the value of x need to be in order for it to be true that m ll n ? Be sure to show all calculations and algebraic steps in your response worth 20 points . anyone?

Answer 1

7x-21=4x+18
first combine like terms by transposition:
7x-4x=21+18
3x=39
x=39/3
x=13

Answer: x=13

Answer 2

x = 13

Explanation:

7x - 21 = 4x + 18

- 4x -4x

3x - 21 = 18

+ 21. + 21

3x = 39

/ 3. /3

x= 13

I'm going to be so real. I did this ages ago, so I'm not sure if this explanation is gonna be good. For alternate exterior angles, if they're equal in measure, they're parallel. Thus, we want to find when they're equal.