Question

1 )Stiind ca:

a=(6+3:3-5):2

b=5-4:(8-6:1)

c =(7+9):4-3×(8-2×4)

Calculeaza:

5×a-b:3+c:2

2) a=(5+5:5+2-2:2)×2

b=16:(25:5-12:3)

c=2-27:(5×5+2:1)

Calculeaza 2 a +38+c

Answer 1

a=(6+3:3-5):2 a=(6+1-5):2 a=(7-5):2 a=2:2 a=1 b=5-4:(8-6:1) b=5-4:(8-6) b=5-4:2 b=5-2↔️b=3 c=(7+9):4-3*(8-2*4) c=(7+9):4-3*(8-8) c=(7+9):4-3*0 c=(7+9):4-0 c=16:4-0=4-0=4➡️c=4 Inlocuim pe a,b si c in ecuatie: 5*a-b:3+c:2 5*1-3:3+4:2 5-1+2=4+2=6 2)a=(5+5:5+2-2:2)*2 a=(5+1+2-1)*2 a=(6+1)*2 a=7*2 a=14 b=16:(25:5-12:3) b=16:(5-4) b=16:1 b=16 c=2-27:(5*5+2:1) c=2-27:(25+2) c=2-27:27 c=2-1 c=1 Calculeaza:2a+38+c= 2*14+38+1=28+38+1=67