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360 : (x-7 ) = 90
( x - 7 ) = 360 : 90
x - 7 = 4
x = 4 + 7
x = 11
Tìm x thuộc N biết:
X+245=43×11
=>x+245=473
=>x=228
X-382=159:3
=>x-382=53
=>x=53+382=438
7×X+2×X=918
=>(7+2).x=918
=>9x=918
=>x=918:9=102
3×(X-2)+150=240
=>3.(x-2)=240-150
=>3.(x-2)=90
=>x-2=90:3=30
=>x=30+2=32
(X+13):5=12
=>(x+13)=12.5
=>x+13=60
=>x=60-13
=>x=47
Bấm **** nha
360:(X-7)=90
X+245=43*11
X+245=473
x=473-245
X=228
X-382=159:3
X-382=53
X=382+53
X=435
7*X+2*X=918
(7+2)*X=918
9*X=918
X=918:9
X=102
3*(X-2)+150=240
3*(X-2)=240-150
3*(X-2)=90
X-2=90:3
X-2=30
X=30-2
X=28
(X+13):5=12
X+13=12*5
X+13=60
X=60-13
X=47
360:(X-7)=90
X-7=360:90
X-7=4
X=7+4
X=11
3.(x-2)+150=240
=>3.(x-2)=90
=>x-2=30
=>x=32
360:(x-7)=90
=>x-7=4
=>x=11
Cau cuối mình không hiểu đề cho lắm
7.x + 2.x = 927
\(\Leftrightarrow\)( 7 + 2).x =927
\(\Leftrightarrow\)9.x = 927
\(\Leftrightarrow\)x = 927 : 9
\(\Leftrightarrow\)x = 103
Vậy x = 103
3(x-2)+150=240
\(\Leftrightarrow\)3(x-2)=240-150
\(\Leftrightarrow\)3(x-2)=90
\(\Leftrightarrow\)x-2=90:3
\(\Leftrightarrow\)x-2=30
\(\Leftrightarrow\)x=30+2
\(\Leftrightarrow\)x=32
Vậy x=32
( x + 13 ) : 5 = 120
\(\Leftrightarrow\)x + 13 = 120 \(\times\)5
\(\Leftrightarrow\)x + 13 = 600
\(\Leftrightarrow\)x = 600 - 13
\(\Leftrightarrow\)x = 587
Vậy x = 587
360:(x-7)=90
\(\Leftrightarrow\)x-7=360:90
\(\Leftrightarrow\)x-7=40
\(\Leftrightarrow\)x=40+7
\(\Leftrightarrow\)x=47
Vậy x=47
7.x + 2.x = 927
x.(7 + 2) = 927
x.9 = 927
x = 927 : 9
x = 103
Vậy x = 103
3(x - 2) + 150 = 240
3(x - 2) = 240 - 150
3.(x - 2) = 90
x - 2 = 90 : 3 = 30
x = 30 + 2 = 32
Vậy x = 32
(x + 13) : 5 = 120
x + 13 = 120 x 5 = 600
x = 600 - 13 = 587
Vậy x = 587
360:(x - 7) = 90
x - 7 = 360 : 90 = 4
x = 4 + 7 = 11
Vậy x = 11
Ủng hộ mk nha !!! ^_^
\(\left(2x+13\right):5=17\)
\(\Rightarrow2x+13=17.5\)
\(\Rightarrow2x+13=85\)
\(\Rightarrow2x=85-13\)
\(\Rightarrow2x=72\Rightarrow x=\frac{72}{2}=36\)
\(360:\left(11x-7\right)=90\)
\(11x-7=\frac{360}{90}\)
\(\Rightarrow11x-7=4\)
\(\Rightarrow11x=4+7=11\)
\(\Rightarrow x=\frac{11}{11}=1\)
\(30:\left(3x-7\right)=15\)
\(\Rightarrow3x-7=\frac{30}{15}=2\)
\(\Rightarrow3x=2+7=9\)
\(\Rightarrow x=\frac{9}{3}=3\)
a,\(\left(2x+13\right):5=17\)
\(2x+13=17.5\)
\(2x=72\)
\(x=72:2\)
\(x=36\)
b,\(360:\left(11x-7\right)=90\)
\(11x-7=4\)
\(11x=11\)
\(x=1\)
c,\(30:\left(3x-7\right)=15\)
\(3x-7=2\)
\(3x=9\)
\(x=3\)
Diện tích hình thang cân bên là :
A . 45 cm2
B . 90 cm2
C . 360 cm2
D . 180 cm2
360:(x-7)=90
(x-7)=360:90
(x-7)=4
x=4+7
x=11