Question

Ex 14 ajutatima varog!!

Answer 1

a) x+30+x+180 (deoarece unghiul alungit are 180°)
2x=150
x=75
b) x-42+x=180
2x=138
x=69
c) x+ 3/5x=180
(x+3/5x=1,6) 1,6x=180
x=112,5
d) 90+x+24+x=180
2x=66
x=33
e) x+x-3+90=180
2x=93
x+46,5

Answer 2

a) x+30+x= 180
2x= 150
x=75
b) x-42+x= 180
2x=212
x=106
c) x+ 3x/5= 180 (aducem la acelasi numitor, deci amplificam pe x si pe 180 cu 5)
5x+3x=900
8x=900
x=112,5
d) x+24+x+90=180
2x=66
x=33
e) x+x-3+90=180
2x=93
x=46,5