6.) d.) 7-5x= -13
-5x= -13-7
-5x= -20
x= -20/-5
x= 4
e.) 2-9x= -25
-9x= -25-2
-9x= -27
x= -27/-9
x= 3
f.) 6-4x= -22
-4x= -22-6
-4x= -28
x= -28/-4
x= 7
7.) d.) 24: (-x)-7= -13
24:(-x)= -13+7
24:(-x)= -6
-x= 24/-6
-x= -4, x= 4
e.) 32:(-x)-6= -10
32:(-x)= -10+6
32:(-x)= -4
-x= 32/-4
-x= -8, x= 8
f.)45:(-x)-8= -13
45:(-x)= -13+8
45:(-x)= -5
-x= 45/-5
-x= -9, x= 9
Răspuns:
Explicație pas cu pas:
7 - 5x = -13
7 + 13 = 5x
20 = 5x
x = 20 : 5 = 4
_______
2 - 9x = -25
2 + 25 = 9x
27 = 9x
x = 27 : 9 = 3
_________
6 - 4x = -22
6 + 22 = 4x
28 = 4x
x = 28 : 4 = 7
___________________
24 : (-x) - 7 = -13
24 : (-x) = 7 - 13 = -6
x = 24 : 6 = 4
__________
32 : (-x) -6 = -10
32 : (-x) = 6 - 10 = - 4
x = 32 : 4 = 8
__________
45 : (-x) - 8 = -13
45 : (-x) = 8 -13 = -5
x = 45: 5 = 9