Question

AYUDA!!!

3(2x+9)+4=31

3(2x-2)+2(1-x)=12

2(7x+1)+5(4x-2)=9

2(7x-8)+7(2-x)=26​

Answer 1

Respuesta:

• 3(2x+9) + 4 = 31

6x + 27 + 4 = 31

6x + 31 = 31

6x = 0

x = 0

• 3(2x-2) + 2(1-x) = 12
• 6x - 6 + 2 - 2x = 12
• 4x -4 = 12
• 4x = 16
• x= 4

2(7x+1) + 5(4x-2) =9

14x + 2 + 20x -10 = 9

34x - 8 = 9

34x = 17

x = 1/2

• 2(7x-8) + 7(2-x) =26
• 14x - 16 + 14 - 7x = 26
• 7x -2 = 26
• 7x = 28
• x = 4