Tìm x:
x + 125 = 266
Tìm x:
a) x – 125 = 344
b) x + 125 = 266
x = 344 + 125
x = 469
b) x + 125 = 266
x = 266 - 125
x = 141
Tìm x:
a.(x+729)x38=54226
(1862-x)x26=38714
b.49203:(x-47)=63
10 266-(x+75)=29
a) (x + 729) x 38 = 54226
x + 729 = 54226 : 38
x + 729 = 1427
x = 1427 - 729
x = 698
b) (1862 - x) x 26 = 38714
1862 - x = 38714 : 26
1862 - x = 1489
x = 1862 - 1489
x = 373
c) 49203 : (x - 47) = 63
x - 47 = 49203 : 63
x - 47 = 781
x = 781 + 47
x = 828
d) 10266 - (x + 75) = 29
x + 75 = 10266 - 29
x + 75 = 10237
x = 10237 - 75
x = 10162
Tìm x biết:
a, ( x – 266) : 5 = 7
b, (x - 129) × 4 = 36
c, 786 – x = 5 × 4 : 2
d, x + 24 : 4 × 3 = 285
a) ( x - 266 ): 5 = 7
( x - 266 ) = 7 x 5
( x - 266 ) = 35
x = 35 + 266
x = 301
b) ( x - 129 ) x 4 = 36
( x - 129 ) = 36 : 4
( x - 129 ) = 9
x = 9 + 129
x = 138
c) 786 - x = 5 x 4 : 2
786 - x = 20 : 2
786 - x = 10
x = 786 - 10
x = 776
d) x + 24 : 4 x 3 = 285
x + 6 x 3 = 285
x + 18 = 285
x = 285 - 18
x = 267
(532 x 7 - 266 x 14) x (532 x 7 + 266)
(532 x 7 - 266 x 14) x ( 532 x 7 + 266)
=523 x 7 - 266 x 13
=3661 - 3458
=203
Tính nhanh:
( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )
( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )
= 0 x( 532 x 7 + 266 )
= 0
tinh ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )
Tìm x:
a, (x+7)*8-14=66 b, x*7+x*12=266
a) (X+7)x8-14=66 b) Xx7+Xx12=266
(X+7)x8 = 66+14 Xx(7+12)=266
(X+7)x8 = 80 Xx19 =266
X+7 = 80 : 8 X = 266 : 19
X +7 = 10 X = 14
X = 10-7
X = 3
k mik nha
a,(x+7)*8-14=66 b,x*7+x*12=266
(x+7)*8=66+14=80 x*(7+12)=266
x+7=80:8=10 x*19=266
x=10-7=3 x=266:19
x=14
tk mk nha bn
chúc bn hk giỏi
a, (X+7)x8-14=66
=>(X+7)x8=66+14
=>(X+7)x8=80
=>X+7=80:8
=>X+7=10
=>X=10-7
=>X=3
câu b tương tự
125-(30+x+125)=(x-237)-(8-237) tìm x
125-30-x-125=x-237-8+237
-30-x=x-8
=> -30=2x-8
=> x=-11
Tìm x: A.55+7x=125 B.55-(19-x)=125