-x - 18 = 12
-x = 12 + 18
-x = 30
x = -30
3x - 5 = x + 11
3x - x = 5 + 11
2x = 16
x = 8
-39 + x + 165 = -19 + 165
126 + x = 146
x = 146 - 126
x = 20
c)-39+x+165=-19+165
-39+x+165=146
-39+x=146-165
-39+x=-19
x=-39-(-19)
x=-20
k mik nha đang âm điểm
-x - 18 = 12
-x = 12 + 18
-x = 30
x = -30
3x - 5 = x + 11
3x - x = 5 + 11
2x = 16
x = 8
-39 + x + 165 = -19 + 165
126 + x = 146
x = 146 - 126
x = 20
c)-39+x+165=-19+165
-39+x+165=146
-39+x=146-165
-39+x=-19
x=-39-(-19)
x=-20
k mik nha đang âm điểm
Bài 1:Tìm x
a) 5x+x=39-3^11:3^9
b) 7x-x=5^21:5^19+3.2^2-7^0
c) 7x-2x =6^17:6^15+44:11
A, 7 x - x = 5^21 : 5^19 + 3 . 2^2 - 7^0
B, 6 x + x = 5^11 : 5^19 + 3^1
C, 7 x - 2x = 6^17 : 6^15 + 44:11
Bài 1: Tìm x nguyên, biết:
a) x + 5 = 20 - (12 -7)
b)15 - (3+ 2x) = 22
c) -11 - (19 - x) = 50
d)159 - (25 - x) = 43
e) (79 - x) - 43 = - (17 - 52)
f) (7 + x) - (21 - 13) = 32
g) - x + 20 = (-15) + 8 + 13
h) - (-x + 13 -142) + 18 = 55
Xin cảm ơn!
A) 78-2x=42
B)6x+39=75
C) 2^3.x+ 2.x=25.2^2
D) 21+7x = 56
E) 5x +2x = 6^2-5^0
F)15x + 3x = 450 : 2+9
G) 6x+x=5^11: 5^9+3^1
H) 5x + 3x=3^11: 3^8.4+12
i) 2^3.x + 2^2.x =136-2^20 : 2^16
j) 7x -x= 5^21: 5^19+3.2^2
k) 7x - 2x= 6^17: 6^15 + 44 :11
l) 0: x =0 m) 3^x=27 n) 4^x= 64
o) 2^x = 32 p) 9^x-1=81 q) x^4=16
r) 3^x :3^
p) 9^x-1=81
q) x^4=165=1
tìm x, biết:
a, 5x + x = 39-311:39
b, 7x - x = 521:519+3.22-70
c, 7x - 2x = 617:615+44:11
a, 5x+x=39-311 :39
b,7x-x=521:519+3x22-70
c,7x-2x=617:615+44:11
Tìm x:
7x - x =521: 519+3.22- 707x -2x=617: 615 + 44:115x + x=39- 311:39Hepl me
a , 4x + 2x = 68 - 219 : 216
b , 5x + x = 39 - 311 : 39
c , 7x - x = 521 : 519 + 3.22 - 70
d , 7x - 2x = 617 : 615 + 44 : 11
Tim x
A, 6 x + x = 5^11 : 5^9 +3^1
B, 7 x - x = 5^21 : 5^19 + 3 . 2^2 -7^0
C, 7 x - 2x = 6^17 : 6^15 + 44 : 11
giup minh nhe . Thank you