9 - 25 = ( 7 - x ) - (25 + 7)
=> -16 = 7 - x - 32
=> x = 7 - 32 + 16
=> x = -9
b. 9 - 25= (7-x)-(25+7)
=>(7-x)-(25+7)= 9 - 25
(7-x)-(25+7)=-16
(7-x)-32=-16
7-x=-16+32
7-x=16
x=7-16
x=-9
a)15 - x = 7 - (-2)
b) 11 - ( 15 + 11 ) = x - (25 - 9 )
c) ( 7 - x ) - ( 25 + 7 ) =9 - 25
Tìm số nguyên x, biết :
a) 11 - (15 + 21) = x -(25 - 9)
b) 9 - 25 = (7 - x) - (25 + 7)
A) 9 - 25 = (7 - x) - (25 + 7)
B) x - (17 - x) = x - 7
tìm x:
a, x-(17-x)=x-7
b, 9-25=(7-x)-25+7
a) (-4).(x+41)=400
b) 9-25=(7-x)-(25+7)
Bài 1 : Tìm số nguyên x biết :
a, 11 - ( 15 + 11 ) = x - ( 25 - 9 )
b, 2 - x = 17 - ( - 5 )
c, x - 12 = ( - 9 ) - 15
d, 9 - 25 = ( 7 - x ) - ( 25 + 7 )
tim x,biet
a, 1-[15+11] = x-[25-9]
b,2-x=17-[-5]
c, x-12=[-9]-15
d,9-25=[ 7- x] -[25+7]
Tìm x:
a) x - (17 - 8) = 5 + (10 - 3x)
b) 25 - (30 +x) = x - (27 - 8)
c) (x-12) - 15 = (20 - 7) - (18 + x)
d) 9 - 25 = (7 - x) - (25 + 7)
Tìm x:( áp dungj quy tắc chuyển vế để làm )
a)2-x=17-(-5)
b)11-(15+11)=x-(25-9)
c)9-25=(7-x)-(25+7)
d)x-(17-x)=x-7
e)3x + 26 =5
