a) 3x + 27= 45
3x+27=45
3x+27=45
3x =45-27
3x =18
x =18:3
x =6
vậy x=6
Tìm các số nguyên x , biết :
a) x + 7 =19 b) 42-3x = 27 c) 45 : ( 3 - x ) = 5
a) x + 7 = 19
x = 19 - 7
x = 12
b) 42 - 3x = 27
3x = 42 - 27
3x = 15
x = 15 : 3
x = 5
c) 45 : (3 - x) = 5
3 - x = 45 : 5
3 - x = 9
x = 3 - 9
x = (-6)
a) (x – 45).27 = 0
=> x - 45 = 0
=> x = 45
b) 23.(42- x) = 23
=> 42- x = 1
=> x = 41
c. 3x – 5=7
=> 3x = 12
=> x = 4
e. 15 – 5x=10
=> 5x = 5
=> x = 1
3x + 27 = 45
73 + x - 122 = 234 : 2
3x + 27 = 45
=> 3x = 45 - 27
=> 3x = 18
=> x = 18 : 3
=> x = 6
73 + x - 122 = 234 : 2
=> 73 + x - 122 = 117
=> 73 + x = 117 + 122
=> 73 + x = 239
=> x = 239 - 73
=> x = 166
ĐÓ MÌNH TRẢ LỜI RỒI !
a)x-(32-27)=3x-(32+x)
b)45-(2x-37)=+x-54
c)42-(3-x)=25-34
d)(25-2x)-34=x-54
Tìm x:
a) x + 27 = 45
b) x - 27 = 45
c) 45 - x = 27
d) 25 + x = 18 + 52
Bài làm:
a) x + 27 = 45
x = 45 - 27
x = 18
Vậy x = 18
b) x - 27 = 45
x = 45 + 27
x = 72
Vậy x = 72
c) 45 - x = 27
x = 45 - 27
x = 18
Vậy x = 18
d) 25 + x = 18 + 52
25 + x = 70
x = 70 - 25
x = 45
Vậy x = 45
giup minh voi
a, 3x - 45 = 5 b, 4x + 27=12
a, 3x - 45 = 5
3x = 5 + 45
3x = 50
x = 50/3
Vậy x = 50/3
b, 4x + 27 = 12
4x = 12 - 27
4x = -15
x = -15/4
Vậy x = -15/4
a)3x-45=5
3x=5+45
3x=50
x=50:3
x=50/3
b)4x+27=12
4x=12-27
4x=-15
x=(-15):4
x=-3,75
a,3x-45=5
3x =5+45
3x =50
x =50:3
x=\(\frac{50}{3}\)
b,4x+27=12
4x =12-27
4x =-15
x =-15:4
x =
c \(\frac{\left(2x-4\right)\left(x-3\right)}{\left(x-2\right)\left(3x^2-27\right)}=\frac{2\left(x-2\right)\left(x-3\right)}{3\left(x-2\right)\left(x^2-9\right)}\)
\(=\frac{2\left(x-2\right)\left(x-3\right)}{3\left(x-2\right)\left(x-3\right)\left(x+3\right)}=\frac{2}{3\left(x+3\right)}\)
d, \(\frac{x^2+5x+6}{x^2+4x+4}=\frac{\left(x+2\right)\left(x+3\right)}{\left(x+2\right)^2}=\frac{x+3}{x+2}\)
Tương tự với a ; b