Question

What is the value of x 24 9 21 14

Answer 1

Both of this angles are same side interior angles which means both of this angles when added equal to 180 degrees

5x +15 + 3x - 3 = 180

8x - 12 = 180
     +12     +12

8x = 192 

x = 24

Answer 2

we know that

$(5x+15)\°+(3x-3)\°=180\°$ -----> by consecutive interior angles

so

Solve for x

$(5x+15)+(3x-3)=180\\ 8x+12=180\\8x=180-12 \\x=168/8 \\x=21\°$

therefore

the answer is

$x=21\°$