Question

determinati pe x din relatiile de mai jos
a)(×-5):4+2×8=18
b)(×+3)×2-81:9=1​

Answer 1

Răspuns:

a)

(×-5):4+2×8=18

(x-5):4+16=18

(x-5):4=18-16

(x-5):4=2

x-5=2x4

x-5=8

x=8+5

x=13

b)

(×+3)×2-81:9=1

(x+3)x2-9=1

(x+3)X2=1+9

(x+3)X2=10

(x+3)=10:2

x+3=5

x=5-3

x=2