Question

Va rog trebuie repede

Answer 1

a) 2x=8
x=4
b) 3x=32
x=32/3
c) 5+2x-2=12
2x=9
x=9/2
d) 3x-9-8=20
3x=37
x=37/3
e) 15-4x-4=10
-4x=-1
x=1/4
f) 1 intreg si 1/15=16/15
Numitor comun: 15
Amplificam x cu 15 si a doua fractie cu 5.
15x-10=16
15x=26
x=26/15

Answer 2

a) 2x + 7 = 15/ -7

2x = 8/ ÷2

x = 4

b) 3x - 11 = 21/ +11

3x = 32/ ÷3

x = 32÷3

c) 5 + 2(x - 1) = 12/ -5

2(x - 1) = 7

2x - 2 = 7/ +2

2x = 9/ ÷2

x = 9÷2

d) 3(x - 3) - 8 = 20/ +8

3(x - 3) = 28

3x - 9 = 28/ +9

3x = 37/ ÷3

x = 37÷3

e) 15 - 4(x + 1) = 10/ -15

-4(x + 1) = -5

-4x - 4 = -5/ +4

-4x = -1/ ÷(-4)

x = (-1)÷(-4)

x = 1÷4

x = 0.25

f) x - 2÷3 = 1 1÷15

x - 2÷3 = 16÷15 / ·15

15x - 10 = 16/ +10

15x = 26/ ÷15

x = 26÷15