Question

Determinati solutile ecuatilor.Va rog cat de repede am nevoie mare!

Answer 1

Răspuns:

Explicație pas cu pas:

c) 3(2x+3)+2(3x+2)=9x+4 ⇔ 6x+9+6x+4=9x+4

12x-9x=4-13 ⇔ 3x=-9 ⇒x=-3

d) 5(x-2)-2x+3(x+1)=6+7x ⇔ 5x-10-2x+3x+3=6+7x

6x-7x=6+7 ⇔ -x=13 ⇒ x=-13

e)  -3x+5+6(-x+1)=-4(x+6)  ⇔ -3x+5-6x+6=-4x-24

 -9x+4x=-24-11 ⇔ -5x=-35 ⇒5x=35 ⇒x=7

f) 6(x+2)-2(2x+3)+4x=36  ⇔6x+12-4x-6+4x=36

6x=36+6  ⇔6x=42 ⇒ x=7