Question

1.6n-9=-3n+18
2.6 [8+6 (p+7)]=5
Eu am obținut asa:
1. 9 sau 27
2. 199/36

Answer 1

1. 6n-9= -3n+18 => 6n+3n= 18+9 => 9n = 27 => n=3 
2. 6[8+6(p+7)]=5 => 9+6(p+7) = 5/6 => 6(p+7)=5/6 - 8 aducem la acelasi numitor => 6(p+7) = (5-6*8)/6 => p+7= -43/36=> p= -43/36 - 7 aducem la acelasi numitor => p= (-43- 7*36)/36 => p= (-43-252)/36 => p= -295/36