Question

Vă rog, urgent!!! Dau 10 puncte și dacă este bine dau coroană!!! ฅ^•ﻌ•^ฅ

Answer 1

Răspuns:

1) 5x+x=6x

6x•2=12x

360°÷12=30°

30=x

2)3a-60°+30°=3a-30°

(3a-30°)×2=360

6a-60=360

6a=420

420:6=70

3)a = 40

c=40

2a+b=?

360-80=280

280:2=140

140-2a=60

b=60

4)9a×2+2a

360÷20=18

a=18

b=18×9+10

162+10=172

Answer 2

Răspuns:

1) 5x + x = 180* , 6x=180*, x= 30*

2)3a - 60*=30* , 3a = 60*+30* , 3a = 90* , a= 30*

3)a=c=40*

2a+b+c =180* , 2×40*+b+40*=180*,80*+b+40*=180*,b=180* - 120* ,b= 60*

4)9a=c+10*

9a+a = 180* , 10a = 180* , a = 18*

9a=c+10* , 9×18* = c+10* , c = 162* - 10* , c= 152*