Question

rezolvatii ecuatiile:5(×-2)-2×-(6+7×)=3(-×-1) ; 3(×+2)-(4×+1)=2(4-×) ;7(×+3)-3×=5+6(×+5)-4×;VA ROG FRUMOS!​

Answer 1

Răspuns:

-13,3,7

Explicație pas cu pas:

5(x-2)-2x-(6+7x)=3(-x-1)  <=>

<=> 5x-10-2x-6-7x=-3x-3  <=>

<=>  -4x-16=-3x-3 <=>

<=>  -x=13 => x=-13

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

<=> 3x+6-4x-1=8-2x <=>

<=> -x+5=8-2x <=>

<=> x=3

7(x+3)-3x=5+6(x+5)-4x <=>

<=> 7x+21-3x=5+6x+30-4x <=>

<=> 4x+21=2x+35 <=>

<=> 2x=14 => x=7