Question

find the measure of each interior angle given by the following figure

Answer 1

The sum of measures for all 4 angles is 360°.
So we have: x°+(4x-26)°+(2x+18)°+x°=360°
Or (8x)°=360°+26°-18°
and (8x)°=368°, we have x°=368°:8= 46°
That is for you!