Question

{10 la a 3 +10 la a 2 ori [10+5la a 2 - x]} : 20la a 2 =6

Answer 1

{10³ +10²× [10+5² - x]} : 20² =6
{1000 +100× [10+25 - x]} : 400 =6
{1000 +100× [35 - x]} =6 ×400
1000 +100× [35 - x] =2400
100× [35 - x] =2400-1000
100× [35 - x] =1400
35 - x =1400:100
35 - x =14
x=35-14
x=21

Answer 2

[10^3 + 10^2 × (10 + 5^2 - x)] : 20^2 = 6

[1000 + 100 × (10 + 25 - x)] : 400 = 6

1000 + 100 × (35 - x) = 6 × 400

1000 + 100 × (35 -x) = 2 400

100 × (35 -x) = 2 400 - 1000

100 ×(35 - x) = 1 400

35 - x =1 400 : 100

35 - x = 14

x = 35 - 14

x = 21