Question

ex de mai jos va rogg​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

5x - 10 = 45

5x = 45 + 10 = 55

x = 55 : 5 = 11

b)

3x + 3 - 5 = x + 6

3x - 2 = x + 6

3x - x = 6 + 2

2x = 8

x = 8: 2 = 4

c)

4x + 3x + 3 = 2x - 2

7x + 3 = 2x - 2

7x - 2x = -2 - 3

5x = -5

x = -5 : 5 = -1

Answer 2

Răspuns:

a) 5(x-2)=45

5x-10=45

5x=45+10

5x=55

x=11

b) 3(x+1)-5=x+6

3x+3-5=x+6

3x+3-5-x+6=0

2x+4=0

2x=-4

x=-2

c) 4x+3(x+1)=2(x-1)

4x+3x+3=2x-2

4x+3x+3-2x+2=0

5x+5=0

5x=-5

x=-1