Question

Sa se rezolve in Z ecuațiile:

a) 2x-3=-7
b)3(x+1)=11-x
c)-4x+2=-30

Answer 1

a) 2x=-7+3
2x=-4
=>x=-2

b)3(x+1)=11-x
3x+3=11-x
3x+x=11-3
4x=8
x=8:4
x=2

c)-4x+2=-30
-4x=-30-2
-4x=-32
-x=-8
=>x=8

Answer 2

Răspuns:

A) 2x-3=-7

2x=-7+3

2x=-4

x=-4:2=-2

B)3(x+1)=11-x

3x+3=11-x

4x=8

x=8:4=2

C)-4x+2=-30

-4x=-30-2

-4x=-32

x=-32:(-4)=8

Explicație pas cu pas:

Sper ca te-am ajutat