Tính : (-152) - (3x+1) = (-2) . (-77)
-152-(3x+1)=(-2).(-77)
(-152) - (3x+1) = (-2). (-77)
( - 152 ) - ( 3x+1 ) = (-2) . (-77)
(- 152 ) - (3x +1 ) = 154
3x +1 = (-152)- 154
3x + 1 = -306
3x = - 306 - 1
3x = - 307
x = - 307 : 3
x = - 307 / 3 ( dấu / là chỉ phân số)
-152-(3x+1)=-2.(-77)
/4-5x/=24 (với x<0)
-152-(3x+1)=-2.(-77)
-152-(3x+1)=154
3x+1 = 154 + 152
3x + 1 = 306
3x = 306 - 1
3x = 305
x = \(\frac{305}{3}\)
Trả lời :
- 152 - ( 3x + 1 ) = - 2 . ( - 77 )
- 152 - ( 3x + 1 ) = 154
=> 3x - 1 = ( - 152 ) - 154
=> 3x - 1 = - 306
3x = - 306 + 1
3x = - 305
=> x = - 305 : 3
x = \(\frac{-305}{3}\)
Vậy x = \(\frac{-305}{3}\)
Tìm số nguyên x, biết :
a, -152 - ( 3x + 1 ) = (-2) . (-77)
b, 234 + ( -334 - x ) = 500
c, ( 567 - x ) + 121 = -641
Minh can gap!!!!!
\(a,-152-\left(3x+1\right)=\left(-2\right).\left(-77\right)\)
\(-152-\left(3x+1\right)=154\)
\(3x+1=-152-154\)
\(3x=306\)
\(x=-102\)
Vậy \(x=-102\)
\(b,234+\left(-334-x\right)=500\)
\(-334-x=266\)
\(x=-600\)
Vậy \(x=-600\)
\(c,\left(567-x\right)+121=-641\)
\(567-x=-762\)
\(x=1329\)
Vậy \(x=1329\)
Làm lại câu a :
a, -152-(3x+1)=(-2).(-77)
-152-(3x+1)=154
3x+1=-306
3x=-307
x=-307/3
Vậy x=-307/3
a,-152-(3x+1)=(-2).(-77)
-152-(3x+1)=154
3x+1=-152-154
3x+1=-306
3x=-307
x=-307/3
b,234+(-334-x)=500
-334-x=500-234
-334-x=266
x=-334-266
x=-600
c,(567-x)+121=-641
567-x=-641-121
567-x=-762
x=567-(-762)
x=1329
2+5+8...+149+152
=(2+152)+(5+149)+...+77
=154+154+...+77
=154.25+77
=3850+77=3927 Số 25 từ đâu ra?
Tìm x:
a) -152-(3x+1) = (-2).(-77)
b) (-1005).(x+2) = 0
c) (8+x). (6-x) = 0
d) | 4-5x| = 24; x ,x<0
e) (2 +x) mũ 2 = 9
-152=(3x+1)=(-2)-x
Tìm x:
1, (5x-1)(5x+1)=25^2-7x+15
2,(3x-5)(x+1)-(3x-1)(x+1)=x-4
1) \(\left(5x-1\right)\left(5x+1\right)=25x^2-7x+15\)
\(\Leftrightarrow25x^2-1=25x^2-7x+15\)
\(\Leftrightarrow7x=16\Leftrightarrow x=\dfrac{16}{7}\)
2) \(\left(3x-5\right)\left(x+1\right)-\left(3x-1\right)\left(x+1\right)=x-4\)
\(\Leftrightarrow3x^2-2x-5-3x^2-2x+1=x-4\)
\(\Leftrightarrow5x=0\Leftrightarrow x=0\)
|2x-5|= 3
-125-(3x+1) =(-2)×(-77)
Tính giá trị lớn nhất của biẻu thức M=5- | x+1| với x thuộc □
|2x-5|= 3
\(\Rightarrow\orbr{\begin{cases}2x-5=3\\2x-5=-3\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}2x=8\Rightarrow x=4\\2x=2\Rightarrow x=1\end{cases}}\)
Vậy x=4 hoặc =1
-125-(3x+1)=(-2)×(-77)
-125-(3x+1)=154
3x+1=-125-154
3x+1=-279
3x=-279-1
3x=-280
x=\(\frac{-280}{3}\)
Vậy...........................