Question

Oblicz x i sprawdz
a 2 razy x-4=6
b 9-2razy x=5
c -3razy x+2=17
d -2+5razy x= -12
bez linków ,ze sprawdzeniem prosze na juz

Answer 1

2x - 4 = 6 
2x = 10
x=5
spr.  2 *5 - 4 = 6

9 -2x =5
4=2x
x = 2
spr.
9 - 2*2 = 5
9- 4 =5
5=5

-3x + 2 =17
-3x = 15
x= -5
-3 * (-5) +2 =17
15 + 2 = 17
17=17

-2 + 5x = - 12
5x = -10
x = -2
-2 + 5 *(-2) = - 12
-2 -10 = - 12
- 12 = -12