Question

86. Calculează: 2 xa-2x b + 2 x c, ştiind că: 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

Explicație pas cu pas:

a = (5 + 7:7 +2 - 2:2) x 2

a=(5+1+2-1)X2

a=7x2

a=14

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

b=[36-16:(5-4)]:5-4

b=(36-16:1):5-4

b=(36-16):5-4

b=20:5-4

b=4-4

b=0

c = 7+3 x [2 - 27 : (5 x 5 + 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

2 xa-2x b + 2 x c=

2x14-2x0+2x10=

28-0+20=48