Question

25. Află pe „a" din egalitatea:
10 : {[ 10 + 10 x (a-10)]:10-10}=21-20:2-10​

Answer 1

10:{[10+10 x (a-10)]:10-10}=21-20:2-10

10:{[10+10 x (a-10)]:10-10}=21-10-10

10:{[10+10 x (a-10)]:10-10}=11-10

10:{[10+10 x (a-10)]:10-10}=1

[10+10 x (a-10)]:10-10=10

[10+10 x (a-10)]:10=10+10

[10+10 x (a-10}=20x10

10 x a-100=200-10

10 x a=190+100

10 x a=290

a=290:10

a=29

#ElizaTea#