Question

The interior angles formed by the sides of a quadrilateral have measures that sum to 360°.

Answer 1

The sum is 360 degrees.. Therefor 
x + x + 2x + 3 + 2x + 3 = 360
combine alike terms 
6x + 6 = 360
6x = 354
x = 59

Answer 2

Answer:

The value of x is $59\°$

Step-by-step explanation:

we know that

The sum of the internal angles of a quadrilateral must be equal to $360\°$

so

$(2x+3)\°+(2x+3)\°+x\°+x\°=360\°$

solve for x

$2x+2x+x+x=360\°-6\°$

$6x=354\°$

$x=59\°$