Question

Tolong di jawab pakai cara yaa yg nomor 5 & 6 makasih

Answer 1

5. 9× - 9 = 4× + 8 + 72 
    9× - 4x = 8 + 72 + 9 
            5x = 89 
              x = 89 / 5

6. 7k - 14 + 5k + 20 = 2k - 40 
                   12k - 2k = - 40 +14 - 20
                            10k= - 46
                               k = - 4,6 

Answer 2

5. 9(x-1) = 4(x+2) +72
9x-9=4x+8+72
9x-4x=8+72+9
5x=89

6. 7(k-2) +5(k+4)= 2(k-20)
7k+14+5k+20=2k-2k-40
7k+5k-2k=-40+14-20
10k = -46
k = -46/10
  =-23/5