tim X biet: X x 2 + X x 3 + X x 4 + X x 5 + x = 2130
tim X:
X x 2 + X x 3 + X x4 +X=2130
Xx2+Xx3+Xx4+X=2130
Xx2+Xx3+Xx4+Xx1=2130
Xx(2+3+4+1) =2130
Xx10 =2130
X =2130:10
X =213
tk mk nha ^_^
Xx2 +Xx3+Xx4+Xx1=2130
Xx(2+3+4+1)=2130
Xx10=2130
x=2130:10
X=213
Xx(1+2+3+4)=2130
Xx10=2130
X=2130:10
X=213
Vậy X=213
tim x biet: 5*x-3*(4*x-2*(4*x-3*(5*x-2)))=182
Tim x biet : ( x + 1 ) + ( x + 2 ) ( x + 3 ) + ( x +4 ) + ( x + 5 ) = 4 + 5 + 6 + 7 + 8
Ta có : ( x+1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) + ( x + 5 ) = 30
( x + x + x +x +x ) + ( 1 + 2 + 3 + 4 + 5 ) = 30
x * 5 + 15 = 30
x * 5 = 30 - 15
x * 5 = 15
x = 15 : 5
x = 3
Vậy x = 3
Duyệt đi , chúc bạn học giỏi
(x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) = 4 + 5 + 6 + 7 + 8
x + 1 + x + 2 + x + 3 + x + 4 + x + 5 = 30
\(x\)x 5 + 15 = 30
\(x\)x 5 = 30 - 15 = 15
x = 15 : 5 = 3
Tìm X biết:
x x 2 + x x 3 + x x 4 + x = 2130
x x 2 + x x 3 + x x 4 + x = 2130
x x 2 + x x 3 + x x 4 + x x 1= 2130
x x (2 + 3 + 4 + 1) = 2130
x x 10 = 2130
x = 2130 : 10
x = 213
tìm x biết : X x 2 + X x 3 + X x 4 + X = 2130
x.(2+3+4+1)=2130
x.10=2130
x=2130:10
x=213
X x 2 + X x 3 + X x 4 + X = 2130
X x ( 2 + 3 + 4 + 1) = 2130
X x 10 = 2130
X = 2130 : 10
X = 213
X x 2 + X + 3 +X x 4 + X = 2130
X x 2 + X + 3 +X x 4 + X = 2130
X x 2 + X + 3 +X x 4 + X x 1 = 2130
X x (2+3+4+1) = 2130
X x 10 = 2130
X = 2130 : 10
X = 213
x.2+x.3+x.4+x=2130
x.(2+3+4+1)=2130
x.10=2130
x=2130:10=213
vậy x=213
chú thich: dấu ''.'' là dấu nhân
Tìm x:
x x 2 + x x 3 + x x 4 + x = 2130
x * 2 + x * 3 + x * 4 + x = 2130
x * (2 + 3 + 4 + 1) = 2130
x * 10 = 2130
x = 2130 : 10 = 213
2x + 3x + 4x + x = 2130
10x = 2130
x = 2130 ÷ 10
x = 213
X nhân 2+x nhân 3+x nhân 4+x=2130
x.2+x.3+x.4+x=2130
x.(2+3+4+1)=2130
x.10=2130
x=2130:10
x=213
x . 2 + x . 3 + x . 4 + x = 2130
x . ( 2 + 3 + 4 + 1 ) = 2130
x . 10 = 2130
x = 2130 : 10
x = 213
bai1.tim x biet:
a,(x+2).(x+3)-(x-2).(x+5)=0
b,(2x+3).(x-4)+(x-5).(x-2)=(3x-5).(x-4)
c,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)=33
,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)-33 đúng không bạn