[x+1]+[x+4]+[x+7]+...+[x+28]=156
x=1.1
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[x+1]+[x+4]+[x+7]+...+[x+28]=156
x=1.1
( x + 1) + (x + 4) + (x + 7) + ......... + (x + 28) = 156
(x+1)++(x+4)+(x+7)+...+(x+28)=156
( x+1)+( x+4)+( x+7)+.........+( x+28) =156
1.
[x+1]+[x+4]+[x+7]+..........+[x+28]=156
Tìm x:
(x+1)+(x+4)+(x+7)+........+(x+28)=156
Tìm x
(x+1)+(x+4)+(x+7)+...(x+28)=156
Tìm x:
( x +1 ) + ( x +4 ) + ( x +7 ) + .......+ ( x +28 ) + = 156
tìm x:
( x +1 ) + ( x +4 ) + ( x +7 ) + .......+ ( x +28 ) = 156
a) (3/4 + x ) × 7/4 - 5 = 7/6
b) X × 12 + 13 × x + x ÷ 2 + 195 =1995
c) (x + 1 ) + (x + 4 ) + (x + 7) + ...... + ( x + 28 ) = 156