Rozwiąż równania i sprawdź:
a) 3x+4=19
b) 9x-12=42
c) 12a-64=-4
d) 6x-3=39
e) 10+11b=65
f) -15-3c=30
3x=15 /:3
x=5
spr.3*5+4=19
b)9x-12=42
9x=54 /:9
x=6
spr.
9*6-12=42
c)12a-64=-4
12a=60 /:12
a=5
spr. 12*5-64=-4
d)6x-3=39
6x=42 /:6
x=7
spr. 6*7-3=39
e)10+11b=65
11b=55 /:11
b=5
spr. 10+11*5=65
f)-15-3c=30
-3c=45 /:(-3)
c=-15
spr. -15-3*(-15)=30
a) 3x + 4 = 19
3x = 19 - 4
3x = 15 / : 3
x = 5
spr: 3 * 5 + 4 = 19
15 + 4 = 19
19 = 19
b) 9x - 12 = 42
9x = 42 + 12
9x = 54 / : 9
x = 6
spr: 9 * 6 - 12 = 42
54 - 12 = 42
42 = 42
c) 12a - 64 = - 4
12a = - 4 + 64
12a = 60 / : 12
a = 5
spr: 12 * 5 - 64 = - 4
60 - 64 = - 4
- 4 = - 4
d) 6x - 3 = 39
6x = 39 + 3
6x = 42 / : 6
x = 7
spr: 6 * 7 - 3 = 39
42 - 3 = 39
39 = 39
e) 10 + 11b = 65
11b = 65 - 10
11b = 55 / : 11
b = 5
spr: 10 + 11 * 5 = 65
10 + 55 = 65
65 = 65
f) - 15 - 3c = 30
- 3c = 30 + 15
- 3c = 45 / : - 3
c = - 15
spr: - 15 - 3 * ( - 15 ) = 30
- 15 + 45 = 30
30 = 30
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Pozdrawiam...
I liczę na naj... :D
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a) 3x+4=19
3x=15 /:3
x=5
spr.3*5+4=19
b)9x-12=42
9x=54 /:9
x=6
spr.
9*6-12=42
c)12a-64=-4
12a=60 /:12
a=5
spr. 12*5-64=-4
d)6x-3=39
6x=42 /:6
x=7
spr. 6*7-3=39
e)10+11b=65
11b=55 /:11
b=5
spr. 10+11*5=65
f)-15-3c=30
-3c=45 /:(-3)
c=-15
spr. -15-3*(-15)=30
a) 3x + 4 = 19
3x = 19 - 4
3x = 15 / : 3
x = 5
spr: 3 * 5 + 4 = 19
15 + 4 = 19
19 = 19
b) 9x - 12 = 42
9x = 42 + 12
9x = 54 / : 9
x = 6
spr: 9 * 6 - 12 = 42
54 - 12 = 42
42 = 42
c) 12a - 64 = - 4
12a = - 4 + 64
12a = 60 / : 12
a = 5
spr: 12 * 5 - 64 = - 4
60 - 64 = - 4
- 4 = - 4
d) 6x - 3 = 39
6x = 39 + 3
6x = 42 / : 6
x = 7
spr: 6 * 7 - 3 = 39
42 - 3 = 39
39 = 39
e) 10 + 11b = 65
11b = 65 - 10
11b = 55 / : 11
b = 5
spr: 10 + 11 * 5 = 65
10 + 55 = 65
65 = 65
f) - 15 - 3c = 30
- 3c = 30 + 15
- 3c = 45 / : - 3
c = - 15
spr: - 15 - 3 * ( - 15 ) = 30
- 15 + 45 = 30
30 = 30
Mam nadzieję, że pomogłam...
Pozdrawiam...
I liczę na naj... :D