Question 716555
3X-10+A(ANGLE)=180
X+ANGLE =90;ANGLE =90-X
SUBSTITUTE INTO EQUATION 1
3X-10+90-X=180
SUBTRACT 10-90=80
2X+80==180
SUBTRACT 80-180=100
2X=100
X=200===========COMPLEMENT
90-200=110======ANGLE
3(200)-10=590===SUPPLEMENT