Răspuns :

Dianageorgiana794id

Răspuns:

3x-5=16

3x=16+5

x=21:3=>x=7

2x-2+3=31-x

2x+x=31+2-3

3x=30=>x=30:3=>x=10

⁴⁾(x+2)/3+³⁾(x-1)/4=²⁾(2x+3)/6

4x+8+3x-3=4x+6

7x-4x=6+3-8

3x=1=>x=1/3

Explicație pas cu pas:

a)

3x= 16+5

3x=21

x=21/3

x=7

b)

2x-2+3=31-x

2x+x=31-1

3x=30

x=10

c)

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

4x+8+3x-3=4x+6

3x=6+3-8

3x=1

x=1/3

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