Szczegółowe wyjaśnienie:
a) -2 = x + 5
-x = 5+2
-x = 7 ×/-1
x = -7
spr. -2 = x +5
-2 = -7 +5
-2= -2
L=P
b) 2 3/8 = x + 1 1/8
-x = 1 1/8 - 2 3/8
- x = - 10/8 ×/-1
x = 10/8
spr .
2 3/8 = 1 2/8 + 1 1/8
2 3/8 = 2 3/8
c) 5,3 = x - 1,4
- x = - 1,4 - 5,3
- x = - 6,7 ×/ -1
x = 6,7
spr.
5,3 = 6,7 - 1,4
5,3 = 5,3
d) 15 = -3 x
3 x = -15 :/ 3
x = - 5
15 = -3 × (-5)
15 = 15
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Szczegółowe wyjaśnienie:
a) -2 = x + 5
-x = 5+2
-x = 7 ×/-1
x = -7
spr. -2 = x +5
-2 = -7 +5
-2= -2
L=P
b) 2 3/8 = x + 1 1/8
-x = 1 1/8 - 2 3/8
- x = - 10/8 ×/-1
x = 10/8
spr .
2 3/8 = 1 2/8 + 1 1/8
2 3/8 = 2 3/8
L=P
c) 5,3 = x - 1,4
- x = - 1,4 - 5,3
- x = - 6,7 ×/ -1
x = 6,7
spr.
5,3 = 6,7 - 1,4
5,3 = 5,3
L=P
d) 15 = -3 x
3 x = -15 :/ 3
x = - 5
spr .
15 = -3 × (-5)
15 = 15
L=P