Question

Calculeaza : 2xa-2xb+2xc , stiind ca : a = (5+7:7+2-2:2) x 2 , b = [36-16:(35:7-12:3)]:5-4 , c = 7+3 x [2-27:(5 x 5+2:1)]

Answer 1

a= (5+1+2-1)x2= 14
b=[36-16:( 5-4)]:5-4=20:5-4=0
c=7+3x[2-27: 27]=10
2xa-2xb+2xc=28+20=48

Answer 2

a=5+7:7+2-2:2
a=5+1+2-1
a=6+1
a=7

b=[36-16:(35:7-12:3)]:5-4
b=[36-16:(5-4)]:5-4
b=(36-16:1):5-4
b=20:5-4
b=4-4
b=0

c=7+3x[2-27:(5x5+2:1)]
c=7+3x[2-27:(25+2)]
c=7+3x(2-27:27)
c=7+3x(2-1)
c=7+3x1
c=7+3
c=10

2xa-2xb+2xc
2x7-2x0+2x10
14-0+20
14+20
34