Question

Aflati x€ N astfel încât :
a) 3(2x-1)=141
b) 8x+10=6x+18
c) 29-5(x+1) =4
d) 2(3x-1)=3(x+2)+4
e) [37-(x-1)•3]•2=14
f) [(x-3)•2+7] :5= 15

Ajutor răspuns corect vreau

Answer 1

a)6x-3=141
6x=141+3=144
x=144:6
x=24

b)8x=6x+18-10
8x=6x+8
2x=8
x=8:2
x=4

c)29-5x-5=4
29-5x=4+5=9
5x=29-9=20
x=20:5
x=4

d)6x-2=3x+6+4
6x=3x+6+4+2
6x=3x+12
3x=12
x=12:3
x=4

e)37-(x-1)x3=14:2=7
(x-1)x3=37-7=30
x-1=30:3=10
x=10+1
x=11

f)(x-3)x2+7=15x5=45
(x-3)x2=45-7=38
x-3=38:2=19
x=19+3
x=22

Answer 2

a) 3(2x-1)=141
6x-3=141
6x=138  / :6
x=23
b) 8x+10=6x+18
2x=8  /:2
x=4
c) 29-5(x+1) =4
29-5x-5=4
20=5x  /:4
x=5
d) 2(3x-1)=3(x+2)+4
6x-2=3x+6+4
3x=12  / :3
x=4
e) [37-(x-1)•3]•2=14
(37 -3x+3)*2=14
80-6x=14
6x=66   /:6
x=11
f) [(x-3)•2+7] :5= 15
(2x-6+7):5=15  /:5
2x+1=3
2x=2   / :2
x=1