Odpowiedź:
zadanie 1
A x=7
B y=15
C x=2
D z=2
E c=3
F w= 9
G x= 2
H x=1
zadanie 2
a = 3
b = -1
c= 1
zadanie 3
odpowiedź : 3- 2x = 7
zadanie 4
a) obw = 2* 10 + 2*y = 30
20+ 2y = 30
2y = 30 - 20
2y = 10
y = 5
b) 360 : 5 = 72
zadanie 5
11 - 3 = a = 8
8 - 4 = b = 4
zadanie 6
3x - 4 = ?
3*5 - 4 =?
15 - 4 = ?
15-4 = 11
zadanie 7
a) 3x + 2 = 3*1 + 2 = 5
b) 4x +1 = 4*1 + 1 = 5
c) 2x - 3 = 2*1 - 3 = 2-3 = -1
Super zagadka:
a + b = 100
a - b = 40
a = 70
b= 30
