Question

Rezolvati in Z ecuatiile.

a) -4x-36=0
b)-4x+1=-15
c)-6x+4=-8
d)5x+17=2
e)-3x+4=-5
f)5x-3=3x+11
g)4x+13=3x+15
h)5(x-1)=2x+7
i)3(2x-5)=6(x-1)-9

Answer 1

Răspuns:

a) -4x-36=0

-4x=36

x=-9

b) -4x+1=-15

-4x=15-1

-4x=14

x=$-\frac{7}{2}$

c) -6x+4=-8

-6x=-8-4

-6x=-12

x=2

d) 5x+17=2

5==2-17

5x=-15

x=-3

e) -3x+4=-5

-3x=-5-4

-3x=-9

x=3

f) 5x-3=3x+11

5x-3x=11+3

2x=14

x=7

g) 4x+13=3x+15

4x-3x=15-13

x=2

h) 5(x-1)=2x+7

5x-5=2x+7

5x-2x=7+5

3x=12

x=4

i) 3(2x-5)=6(x-1)-9

6x-15=6x-6-9

-15=-6-9

-15=-15

x∈R