Question

Fie: a= (5+5:5+2-2:2) x2
b= (555:5-10: (25:5-12:3)-1]:5-5
c=7+3x (2-3: (5x5-22:1)]
Calculeaza: 2x a+3xb+c​

Answer 1

$a=(5+1+2-1)*2=7*2=14\\b= [555:5-10: (25:5-12:3)-1]:5-5=[111-10: (5-4)-1]:5-5=\\=(111-10:1-1):5-5=100:5-5=20-5=15\\c=7+3* [2-3: (5*5-22:1)]=7+3* [2-3: (25-22)]=7+3* (2-3:3)=7+3*1=10\\2*a+3*b+c=28+45+10=28+55=83$