Решите пожалуйста!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 1. 2(х + 5) = 12 2. 84 : (х - 3) = 42 3. 3(х + 4) = 33 4. (13 – 2х)*3 = 27 5. (5х - 7)*5 = 15 6. (40 – 4х) : 2 = 16 7. 4(х - 3) = 12 8. (15 + 3х)...
Решите пожалуйста!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1. 2(х + 5) = 12
2. 84 : (х - 3) = 42
3. 3(х + 4) = 33
4. (13 – 2х)*3 = 27
5. (5х - 7)*5 = 15
6. (40 – 4х) : 2 = 16
7. 4(х - 3) = 12
8. (15 + 3х) : 3 = 6
9. (63 – 9х) : 3 = 15
10. 15 : (х + 2) = 5
Ответ(ы) на вопрос:
Гость
1. 2(х + 5) = 12
2х+10=12
2х=12-10
2х=2
х=2:2
х=1
2. 84 : (х - 3) = 42
х-3=84:42
х-3=2
х=2+3
х=5
3. 3(х + 4) = 33
3х+12=33
3х=33-12
3х=21
х=21:3
х=7
4. (13 – 2х)*3 = 27
13-2х=27:3
13-2х=9
-2х=9-13
-2х=-4
х=-4:(-2)
х=2
5. (5х - 7)*5 = 15
5х-7=15:5
5х-7=3
5х=3+7
5х=10
х=10:5
х=2
6. (40 – 4х) : 2 = 16
40-4х=16*2
40-4х=32
-4х=32-40
-4х=-8
х=-8:(-4)
х=2
7. 4(х - 3) = 12
4х-12=12
4х=12+12
4х=24
х=24:4
х=6
8. (15 + 3х) : 3 = 6
15+3х=6*3
15+3х=18
3х=18-15
3х=3
х=3:3
х=1
9. (63 – 9х) : 3 = 15
63-9х=15*3
63-9х=45
-9х=45-63
-9х=-18
х=-18:(-9)
х=2
10. 15 : (х + 2) = 5
х+2=15:5
х+2=3
х=3-2
х=1
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