Odpowiedź :
6x + 12 = 42
6x = 42 - 12
6x = 30 / : 5
x = 6
40 - 6x = 28
-6x = 28 - 40
-6x = -12 / : (-6)
x = 2
3x - 12 = 2x + 1
3x - 2x = 1 + 12
x = 13
4x - 3 = 7x - 24
4x - 7x = -24 + 3
-3x = -21 / : (-3)
x = 7
Odpowiedź:
6x + 12 = 42
6x = 42 - 12
6x = 30 /÷6
x = 5
Spr. 6×5+12=42
30+12=42
42=42
L=P
40 - 6x =28
- 6x = 28 - 40
- 6x = - 12 /÷(-6)
x = 2
Spr. 40-6×2=28
40-12=28
28=28
L=P
3x -12 = 2x + 1
3x - 2x = 1 + 12
x = 13
Spr. 3×13-12=2×13+1
39-12=26+1
27=27
L=P
4x - 3 = 7x -24
4x - 7x = - 24 + 3
- 3x = - 21 /÷(-3)
x = 7
Spr. 4×7-3=7×7-24
28-3=49-24
25=25
L=P