Question

g) {12 : [ 9-(2a+2)]} x 4 = 100 : 10 +(10-4)
h) [(a+428:4)x2+5]x2-186 = 800​

Answer 1

Răspuns:

g) a=2

h) a=137

Explicație pas cu pas:

g) [12:(9-2a-2)]×4=10+6

[12:(7-2a)]×4=16

12/(7-2a) ×4=16

48/7-2a=16

48=16(7-2a) |:16

3=7-2a

2a=7-3

2a=4 |:2

a=2

h) [(a+107)×2+5]×2-186=800

(2a+214+5)×2-186=800

(2a+219)×2-186=800

4a+438-186=800

4a+252=800 |-252

4a=548| :4

a=137