Question

Determinati valoarea lui x din:

300 - [ 48 + 6 · 7 - ( x : 3 + 15 ) ] : 3 = 276

Answer 1

300-[48+6*7-(x:3+15)]:3=276
[48+42-(x:3+15)]:3=300-276
[90-(x:3+15)]:3=24
[90-(x:3+15)]=24*3
[90-(x:3+15)]=72
(x:3+15)=90-72
x:3+15=18
x:3=18-15
x:3=3
x=3*3
x=9

Answer 2

300 - [48 + 6 · 7 - (x : 3 + 15)] : 3 = 276
300 - (48 + 42 - x : 3 - 15) : 3 = 276
300 - (90 - x : 3 - 15) : 3 = 276
300 - [(75 - x : 3) : 3] = 276
300 - [75 : 3 - x : 3 : 3] = 276
300 - (25 - x) = 276
300 - 25 + x = 276
275 + x = 276
x = 276 - 275, x = 1