hu yäla svåt ere jenklen

Gröna Vesslan:

Ja det gjorde du säkert om du fick rätt svar

Ja.. jag vet inte om svaret Man kan ju få rätt svar, men fel uträkning hehe.

Anura:

Uppgift 2

2x-1+4x-8 = 5x-9

2x-1+4x-8 = 5x-9
2x+4x-1-8 = 5x-9
6x-9 = 5x-9
6x-9-5x = 5x-9-5x
6x-5x-9 = 5x-5x-9
x-9 = -9
x-9+9 = -9+9
x = 0

x = 0

Uppgift 3

5x+(3+2x) = 18-(x-1)

5x+(3+2x) = 18-(x-1)
5x+3+2x = 18-x+1
5x+2x+3 = -x+18+1
7x+3 = -x+19
7x+3+x = -x+19+x
7x+x+3 = -x+x+19
8x+3 = 19
8x+3-3 = 19-3
8x = 16
8x/8 = 16/8
x = 2

x = 2

Uppgift 4

12-(2x+8) = (x+16)

12-(2x+8) = (x+16)
12-2x-8 = x+16
-2x+12-8 = x+16
-2x+4 = x+16
-2x+4-x = x+16-x
-2x-x+4 = x-x+16
-3x+4 = 16
-3x+4-4 = 16-4
-3x = 12
-3x/(-3) = 12/(-3)
x = -4

x = -4

Uppgift 5

8-5x = 20-3x

8-5x = 20-3x
-5x+8 = -3x+20
-5x+8+3x = -3x+20+3x
-5x+3x+8 = -3x+3x+20
-2x+8 = 20
-2x+8-8 = 20-8
-2x = 12
-2x/(-2) = 12/(-2)
x = -6

x = -6