=>3(2x+1)=33
=>2x+1=11
=>x=5
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tìm số nguyên x :a, -2x+15<3x-7<19-x
b, -3.(2x+5)-16<-4.(3-2x)
c,x+(x+1)+(x+2)+(x+3)+....+13+14=14
-2x+15 < 3x - 17 < 19 -x
x+(x+1) + (x+2) + (x+3) + ... +13 +14 = 14
25 + 24 + 23 + ... + x + (x-2) + (x-3) = 25
tìm x
17x – ( -16x – 37) = 2x +
-2x –3. (x – 17) = 34 – 2(-x + 25
17x + 3. ( -16x – 37) = 2x + 43 - 4x
103 -57: [-2. (2x – 1)2 – (-9)0] = -106
3x – 32 > -5x + 1
15 + 4x < 2x – 145
-3. (2x + 5) -16 < -4. (3 – 2x)
-2x + 15 < 3x – 7 < 19 – x
x + (x+1) + (x+2) + (x+3) + .... + 13 + 14 = 14
25 + 24 + 23 +...+ x + (x - 2) + (x – 3) = 25
a)5. ( x + 35 ) = 515
b) (x+7):3=14c) 72:(x–15)=8
d) 19+(x+23)=50
e) (18–x) + 23 =29
f) 56–(x+14)=22g) (2x +1)–7=14
h) 3. (x+1)–32=67i) 70–5. (x–3)=45
j) 200–8. (2x+7)=112
k) 123–(x+4). 5 =38
Đề bài: Tìm số nguyên xa)-2x – (x – 17) 34 – (-x + 25)b)17x – ( -16x – 37) 2x + 43c)-2x –3. (x – 17) 34 – 2(-x + 25)d)17x + 3. ( -16x – 37) 2x + 43 - 4xe){-3x+ 2. [45 - x - 3(3x+7) -2x]+4x} -48 g)-57: [-2. (2x – 1)2 – (-9)0] -106h)-2x + 3. i)3x – 32 -5x + 1k)15 + 4x 2x – 145l)-3. (2x + 5) -16 -4. (3 – 2x)m)-2x + 15 3x – 7 19 – xn)x + (x+1) + (x+2) + (x+3) + .... + 13 + 14 14p)25 + 24 + 23 +...+ x + (x - 2) + (x – 3) 25
Đọc tiếp
Đề bài: Tìm số nguyên x
a)-2x – (x – 17) = 34 – (-x + 25)
b)17x – ( -16x – 37) = 2x + 43
c)-2x –3. (x – 17) = 34 – 2(-x + 25)
d)17x + 3. ( -16x – 37) = 2x + 43 - 4x
e){-3x+ 2. [45 - x - 3(3x+7) -2x]+4x}= -48
g)-57: [-2. (2x – 1)2 – (-9)0] = -106
h)-2x + 3. 
i)3x – 32 > -5x + 1
k)15 + 4x < 2x – 145
l)-3. (2x + 5) -16 < -4. (3 – 2x)
m)-2x + 15 < 3x – 7 < 19 – x
n)x + (x+1) + (x+2) + (x+3) + .... + 13 + 14 = 14
p)25 + 24 + 23 +...+ x + (x - 2) + (x – 3) = 25
a. 125 : ( 3x - 13 ) = 25
b. 541 + ( 218 + x ) = 735
c. 3( 2x + 1 ) - 19 = 14
Câu 1 tính
65.(-19)+19.(-24)
Câu2 tìm x
a)7x,(2+x)-7x(x+3)=14
B)3.|x-2|+2x=19với x\(\ge\)2
c)2.|3-x|-5x=-24 với x\(\ge\)3
bài 19: tìm x
c) ( 34 - 2x ) . ( 2x - 6 ) = 0
d) ( 2019 - x ) . ( 3x - 12 ) 0
e) 57 . ( 9x - 27 ) = 0
f) 25 + ( 15 - x ) = 30
g) 43 - ( 24 - x ) = 20
h) 2 . ( x - 5 ) - 17 = 25
i) 3 . ( x + 7 ) - 15 = 27
j) 15 + 4 . ( x - 2 ) = 95
k) 20 - ( x + 14 ) = 5
l) 14 + 3 . ( 5 - x ) = 27
nhanh nha, mik tick cho, ccau trình bày dễ hiểu, ko cần ''hoặc''
Bài 3 : Tìm x Z biết.
a) x(x + 2) = 0 e) 7x – 13 = 3 2 .4
b) 5 – 2x = -7 f) 155 – 5(x + 3) = 80
c) (x + 3)(x – 4) = 0 g) 119 + 3 3 .x = 2 3 . 5 2
d) – 32 – 4(x – 5) = 0 h) 3(2x + 1) – 19 = 14