Question

Va rog e foarte urgent macar pe care il stiti va rog e urgent ❤ dau coroana​

Answer 1

Răspuns:

a+2b=17 . 17- 2b=, =14.

Answer 2

5. ab-ac=a(b-c) = 240,

Dar b-c=8, deci ax8=240

a=240:8=30

a=30

6. 3a+6b=54

3(a +2b)=54,

Dar a+2b=54:3=18

a+2b=18

14. 4a+8b=200

4(a+2b)=200

a+2b=200:4=50

14b+7c=140

7(2b+c)=140

2b+c=140:7=20

a+2b-(2b+c)= a+2b-2b-c= a-c=

= 50-20=30

a+2b+(2b+c)= a+2b+2b+c= a+4b+c=

= 50+20 = 70

(a-c)(a+4b+c)=30 x70 =2100