Question

Puteți sa mi-le rezolvati???

Answer 1

16) a)2x+5=17
2x=17-5
2x=12
x=12/2
x=6

b)3x-1=14
3x=14+1
3x=15
x=15/3
x=5

c)2(5x-3)=9
10x-6=9
10x=9+6
10x=15
x=15/10
x=1,5

d)3(2x+7)-5=22
6x+21-5=22
6x=22-21+5
6x=6
x=6/6
x=1

e)5[2(3x+2)-11]+4=29
5(6x+4 -11)+4=29
30x+20+20-55+4=29
30x=29-20+55-4
30x=60
x=60/30
x=2

Answer 2

a) 2x-5=17 | +
2x=22 | ÷2
x=11

b) 3x-1=14
3x=15
x=5

c) 2(5x-3)=94 |÷2
5x-3=47
5x=50
x=10

d) 3(2x+7)-5=22 |+5
3(2x+7)=27
2x+7=9
2x=16
x=8

e) 5[2(3x+2)-11]+4=29
5[2(3x+2)-11]=25
2(3x+2)-11=5
2(3x+2)=16
3x+2=8
3x=6
x=2