Question

A dobra xd . Zmarnuje to 10 punktów i je dodam ;P .
Takie zadanko z 1 gim . xd
Jestem zbyt blondynka , żeby je sama zrobić :D.

Takie se obliczonka z matmy ^^ .

2x = 7
x + 8 = 19
x - 7 = 13
3x + 5 = 12
4x - 3 = 9x + 5
3 ( x + 6 ) - 2x = 2 (x + 9)

3x = 13
x + 10 = 21
x - 14 = 20
4x + 8 = 16
3x - 4 = 10x + 2
( x - 7 ) - 2 (3x + 5 ) = 3

Thx z góry . . :D . . Prosze , zrubcie całe z very dołkadnymi obliczeniami ;)) .
;*

Answer 1

Dobra, :
1. x = 7 : 2
x = 3,5
2. 19 - 8 = 11
x= 11
3. x - 7 = 13
x = 20
4. 3x + 5 = 12
3x= 7
x= 7 : 3 = 2, 33
5.4x - 3 = 9x + 5
4x= 9x + 8
0 = 9x + 8
-8 = 9x
x = -8 : 9 = - 0,88
6. 3 ( x + 6 ) - 2x = 2 (x + 9)
9 -1x = 11 +x
9= 11+ 2x
0 = 2 + 2x
-2 = 2x
x = -2 : 2 = -1
7.3x = 13
x = 4,33
8.x + 10 = 21
x = 11
9.x - 14 = 20
x= 6
10. 4x + 8 = 16
4x= 8
x= 8 : 4 = 2
11.3x - 4 = 10x + 2
3x= 10 x + 6
0 = 7x + 6
-6 = 7x
x = -6 : 7 = - 0,85
12. (x - 7 ) - 2 (3x + 5 ) = 3
(x - 7) + (3x + 5 ) = 5
x+ 3x + 5 = 12
4x = 7
x = 7 : 4 = 1,75


Z ostatnim nie jestem pewna ale spoko ;))