Odpowiedź :
Odpowiedź:
5x - 7x = 2
-2x = 2
x = -1
9x - 8x + 2 = 5
x = 3
7x + 4 - 8x = 0
-x = =4
x = 4
42 + 4x - x = 12
3x = - 30
x = -10
y - 4 + y = 6
2y = 10
y = 5
1,/2z + 3 - z = -2
-1/2z = -5
x = 10
Szczegółowe wyjaśnienie:
5x - 7x = 2
-2x = 2
x = -1
9x - 8x + 2 = 5
x = 3
7x + 4 - 8x = 0
-x = =4
x = 4
42 + 4x - x = 12
3x = - 30
x = -10
y - 4 + y = 6
2y = 10
y = 5
1,/2z + 3 - z = -2
-1/2z = -5
x=10