Question

rezolvati ecuatiile:

5•(2x-1)=15; 3•(4x+5)=39; 6•(3x+9)=-72; 8•(5x+8)=-96; 48:(2x+10)=6; -60:(3x+7)=12; 72:(5x+6)=-8;
E URGEEEENT!!!ACUUUM DAU COROANA SI 50 de puncte!!!!!!!!!!!!!!!

Answer 1

Răspuns:

$5 \times (2x - 1 ) = 15 \\ 10x - 5 = 15 \\ 10x = 15 + 5 \\ 10x = 20 \\ \\ x = 20 \div 10 \\ x = 2$

Answer 2

5×(2x-1)=15/:5

2x-1=3/+1

2x=4/:2

X=2

3×(4x+5)=39/:3

4x+5=13/-5

4x=8/:4

X=2

6×(3x+9)=-72/:6

3x+9=-12/-9

3x=-21/:3

X=-7

8×(5x+8)=-96/:8

5x+8=-12/-8

5x=-20/:5

X=4