Question

Rezolvați in N Ecuația :
3-2(x-1)=x+5
Rezolvați in Z Ecuația:
5(4-x)-1=7-2x

Answer 1

3-2(x-1)=x+5. 3-2x+2=x+5. 3-5+2=x+2x ( am pus de o parte numerele si de o parte numerele cu x). 0=3x. x=0/3. x=0 5(4-x)-1=7-2x. 20-5x-1=7-2x. 20-7-1=5x-2x. 12=3x. x=12/3. x=4 GATA

Answer 2

3-2(x-1)=x+5
3-2x+2=x+5
-2x+5=x+5
-2x-x=5-5
-3x=0
x=0
5(4-x)-1=7-2x
20-5x-1=7-2x
19-5x=7-2x
-5x+2x=7-19
-3x=-12
x=4