a,10x+65=125
10x =125-65
x =60:10
x =6
Vậy:...
b,45-(5-2x)^3=2.3^2
45-(5-2x)^3=18
(5-2x)^3 =45-18
(5-2x)^3 =27=3^3
=> 5-2x = 3
2x = 5-3
x= 2:2
x=1
Vậy:....
-Hok tốt ~ K mk nhak.
a, 10x + 65 = 125
10x = 125 - 65
10x = 60
x = 60 : 10
x = 6
b,45-(5-2x)^3=2.3^2
45 - ( 5 - 2x )^3 =18
(5 - 2x)^3 = 45 - 18
(5 - 2x )^3= 3^3
5 - 2x = 3
2x = 2
x = 1
c,2(x-3)-12=(-10)
2x - 6 -12 =-10
2x = -10 + 6 + 12
2x = 8
x = 4
d,x-12=(-13)+1+|-13|
x - 12 = -13 + 1 + 13
x - 12 = 1
x = 13
hok tốt!!!
\(\text{a)}\)\(10x+65=125\)
\(\Rightarrow10x=60\)
\(\Rightarrow x=6\)
\(b\text{)}\)\(45-\left(5-2x\right)^3=2.3^2\)
\(\Rightarrow45-\left(5-2x\right)^3=18\)
\(\Rightarrow\left(5-2x\right)^3=45-18\)
\(\Rightarrow\left(5-2x\right)^3=27\)
\(\Rightarrow\left(5-2x\right)^3=3^3\)
\(\Rightarrow5-2x=3\)
\(\Rightarrow2x=2\Rightarrow x=1\)
\(a,10x+65=125\) \(b,45-\left(5-2x\right)^3=2.3^2\)
\(\Rightarrow10x=125-65\) \(\Rightarrow45-\left(5-2x\right)^3=18\)
\(\Rightarrow10x=60\) \(\Rightarrow\left(5-2x\right)^3=45-18\)
\(\Rightarrow x=6\) \(\Rightarrow\left(5-2x\right)^3=27\)
\(\Rightarrow\left(5-2x\right)^3=3^3\)
\(\Rightarrow5-2x=3\)
\(\Rightarrow2x=2\)
\(\Rightarrow x=1\)
\(c\text{)}\)\(2\left(x-3\right)-12=\left(-10\right)\)
\(\Rightarrow2\left(x-3\right)=2\)
\(\Rightarrow x-3=1\)
\(\Rightarrow x=4\)
\(d\text{)}\)\(x-12=\left(-13\right)+1+\left|-13\right|\)
\(\Rightarrow x-12=\left(-13\right)+1+13\)
\(\Rightarrow x-12=1\)
\(\Rightarrow x=13\)
\(\text{c,2(x-3)-12=(-10)}\)
\(2\left(x-3\right)=\left(-10\right)+12\)
\(x-3=2:2\)
\(x=1+3\)
\(x=4\)
a,10x + 65=125
10x = 125 - 65
10x = 60
x = 60 : 10
x = 6.
b,45-(5-2x)3=2.32
45-(5-2x)3=2. 9
45-(5-2x)3= 18
(5-2x)3 = 45 - 18
(5-2x)3 = 27
(5-2x) 3 = 33
\(\Rightarrow5-2x=3\)
\(\Rightarrow2x=5-3\)
\(\Rightarrow2x=2\)
\(\Rightarrow x=1\)
c,2(x-3)-12=(-10)
2x - 6 -12= (-10)
2x = (-10) + 12 + 6
2x = 8
x = 8 : 2
x = 4
d,x-12=(-13)+1+|-13|
x-12 = -12 + 13
x-12 = 1
x = 1 + 12
x = 13
Hok tốt !
a) \(10x+65=125\)
\(=>10x=125-65\)
\(=>10x=60\)
\(=>x=6\)
~Hok tốt~
a, 10x+65=125
10x =125-65
10x =60
x =60:10
x = 6
b,45-(5-2x)3=2.32
45-(5-2x)3=18
(5-2x)3 =45-18
(5-2x)3 =27
(5-2x)3 =33
-->5-2x=3
2x=5-3
2x=2
x=1
c,2(x-3)-12=(-10)
2(x-3)=(-10)+12
2(x-3)=2
x-3 = 2:2
x-3=1
x=1+3
x=3
d,x-12=(-13)+1+|-13|
x-12=(-12)+13
x-12=1
x=1+12
x=13
Nếu mk làm sai thì xin lỗi bn
b) Đề bài:
\(45-\left(5-2X\right)^3=2.3^2\)
\(5-2X=45-18\)
\(5-2X=27\)
\(2X=5-27\)
\(2X=-22\)
\(\Rightarrow X=-11\)
~Hok tốt~
a)
10x + 65 = 125
10x = 125 - 65
10x = 60
x = 60 : 10
x = 6