Question

Rezolvati, in multimea numerelor intregi, ecuatiile:
a) 5-x-15=0:
b) 4•x+16=20:
C)
-3.8+11=-1:
d)
-2•x-200=0:
e)
21=7.x-21:
f) 10-x+99 =88;
(g) 2•*+*=-20+(-10):

b) -(1-2x) =-37

VA ROG REPEDE!

Answer 1

Răspuns:

a)5-20-15=0

b)4'1+16=20

d)-2.100-200=0

e)21=7.6-21

f)10- -21+99=88

G)-2.15+0=30

Explicație pas cu pas:

Answer 2

Răspuns:

Explicație pas cu pas:

a) 5-x-15=0

-x-10=0

-x=10

x = -10

b) 4•x+16=20

4x = 20-16

4x = 4

x = 4/4

x= 1

C)-3x+11=-1

-3x = -1-1-3x = -12

x = -12/-3

x = 4

d) -2•x-200=0

-2x = 200

x = -200/2

x = -100

e) 21=7.x-21

7x = 21+21

7x = 42

x = 42/7

x = 6

f) 10-x+99 =88

109 - x = 88

-x = 88-109

-x = - 21

(g) 2•x=-20+(-10)

2x = -20-10

2x = -30

x = -30/2

x = -15

b) -(1-2x) =-37

-1+2x = -37

2x = -37+1

2x = -36

x = -36/2

x = - 18