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zad. 1
a) ax = 2b - 1/ +1
ax + 1 = 2b / :2
= b
b) 2(a - x) = 3b
2a - 2x = 3b
- 2x = 3b - 2a
2x = -3b + 2a
x =
c) 4ab - x = 3a + 2x
4ab - 3a = 2x +x
4ab - 3a = 3x
d) p=*h
2p = (a + b) * h
2p = ah +bh
2p - ah = bh
b =
e) V1 = V0 + at
V1 - V0 = at / t
a =
f) = 1 - / *a
* a = a - x+a
* a = - x
- * a =x
zad. 2
a + a+1 + a+2 = 9
3a+3 = 9
3a = 6
a =2
Strona ma 234 stron.
zad. 3
10a+b + 249= 100a + 10b + 6
b<10
-90a - 9b = -243
10a + b = 27
a = 2 b= 7
Początkowo była to liczba 27
zad. 4
a
10a + 2
20 + a
a + 20 + a = 10 a + 2 - 30
20 + 2a = 10a - 28
-8a = -48
a = 6
Bartek napisał liczbe 6 na początku.
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zad. 1
a) ax = 2b - 1/ +1
ax + 1 = 2b / :2
= b
b) 2(a - x) = 3b
2a - 2x = 3b
- 2x = 3b - 2a
2x = -3b + 2a
x =
c) 4ab - x = 3a + 2x
4ab - 3a = 2x +x
4ab - 3a = 3x
x =
d) p=*h
2p = (a + b) * h
2p = ah +bh
2p - ah = bh
b =
e) V1 = V0 + at
V1 - V0 = at / t
a =
f) = 1 - / *a
* a = a - x+a
* a = - x
- * a =x
zad. 2
a + a+1 + a+2 = 9
3a+3 = 9
3a = 6
a =2
Strona ma 234 stron.
zad. 3
10a+b + 249= 100a + 10b + 6
b<10
-90a - 9b = -243
10a + b = 27
a = 2 b= 7
Początkowo była to liczba 27
zad. 4
a
10a + 2
20 + a
a + 20 + a = 10 a + 2 - 30
20 + 2a = 10a - 28
-8a = -48
a = 6
Bartek napisał liczbe 6 na początku.