2.(x-7)-3.(5-x)=-109
=>2x-14-15+3x=-109
=>5x-29=-109
=>5x=-80
=>x=-16
2.(x-7)-3.(5-x)=-109
=>2x-14-15+3x=-109
=>5x-29=-109
=>5x=-80
=>x=-16
Tìm x bt
a) (x-5) + (x-7) = -12
b) 3x - 44 = -109 -2x
c) 2 ( x-5) - 5 (3+x) =-109
d) (x-3) . (x+5 ) < 0
Tìm x,Biết
2.x+3=8
x:5-2=3
x:7-2=19
(x+3)x2=18
20-(x+3)=5
Tìm x∈Z, biết:
a)x.(x-6)=0
b)(-7-x).(-x+5)=0
c)(x+3).(x-7)=0
d)(x-3).(x2+12)=0
e)(x+1).(2-x) ≥0
f)(x-3).(x-5) ≤0
Tìm biết: a) x (x - 6) = 0; b) x (x + 5) = 0; c) (x + 3)(x - 7) = 0; d) (x - 3) ( x 2 + 12) = 0
a)5-(13-3x)=109-(32+109)
b)/3x-6/+(x-2^2)=0
c)/7-2x/=-13-5.(-8)
Bài 1 : Tìm x thuộc Z, sao cho :
a) ( x - 1 ) ( x - 3 ) > = 0
b) ( x - 5 ) ( x - 7 ) < 0
c) ( x2 - 1 ) ( x2 - 4 ) < 0
a, -2x-11 chia hết cho 3x+2
b,2(x-7)-3(5-x)=-109
c, x-7 chia hết cho x+6
Mình cần gấp nha!
Tìm các số nguyên x, biết:
a, (22 + 5)(x2 + 25) = 0
b, (x2 + 7)(x2 - 49) < 0
c, (x2 - 7)(x2 - 49) < 0
d, (x2 - 36)(x2 - 81) ≤ 0
Tìm x:
a) x-109=(2+4+6+...+2016)-(1+3+5+...+2015)
b)(x+1)+(x+2)+...+(X+20)=40470