198-(x+4)=120
x+4=198-120
x=78-4
x=74
\(198-\left(x+4\right)=120\)
\(x+4=198-120\)
\(x+4=78\)
\(x=78-4=74\)
Vậy \(x=74\)
198-(x+4)=120
198 - (x + 4) = 120
198 - ( x + 4 ) = 120
2 x ( x - 51 ) = 2 x 2^3 + 20
200 - ( 2 x + 6 ) = 4^3
Tìm x, biết:
a) 198 - ( x + 4 ) = 120
b) 2(x-51) = 2.23 + 20
c) 450 : ( x - 19 ) = 50
d)4(x-3) = 72 - 110
tìm x thuoc Z
a) 198-(x+4)=120
b)x-[6:2+(2mũ4 . 3-24.2:6-3)]=10
c) \(9^{x-1}=81\)
d) 1+2+3 ....+x=55
e) \(7\le x< -1\)
x+2x+3x+...+99x=2+4+6+...+198.
x + 2x + 3x + ........ +99x = 2 + 4 + 6 + ........ + 198
1) Tính
A = 200 - 199 + 198 - 197 +.... + 2 - 1
B = 30 + 36 + 42 +...90 + 96 + 10
2) Tìm x :
a) 2x+1 + 2 x = 96
b) (x+1) + (x+2) + (x+3) + (x+4) + (x+5)
Tìm x
a) (x+3)/200 + (x+4)/199 + (x+5)/198= -3
b) (x+4)/2000+ (x+6)/999+(x+8)/499+7=0
c) |x-4| - |2x-1|=6
