3x-(-5)=15+x
3x+5=15+x
3x=15+x-5
3x=10x
x2=10:3
x2=10/3
x=\(\sqrt{\dfrac{10}{3}}\)
3x-(-5)=15+x
3x+5=15+x
3x=15+x-5
3x=10x
x2=10:3
x2=10/3
x=\(\sqrt{\dfrac{10}{3}}\)
Bài 8: tìm x
a) x + 10 = 20
b) 2 . x + 15 = 35
c) 3 ⋅ ( x + 2 ) = 15
d) 10 . x + 15 . 11 = 20 . 10
e) 4 . ( x + 2 ) = 3 . 4
f) 33 x + 135 = 26 . 9
g) 2 . x + 15 + 16 + 17 = 100
h) 2 . (x + 9 + 10 + 11) = 4 . 12 . 25
\(\dfrac{x}{15}=\dfrac{3}{5}-\dfrac{-2}{3}\) ok
\(\Rightarrow\dfrac{x}{15}=\dfrac{9}{15}+\dfrac{10}{15}\)
\(\Rightarrow\dfrac{x}{15}=\dfrac{19}{15}\)
\(\Rightarrow x=19\)
Bài 8: tìm x
a) x + 10 = 20
b) 2 . x + 15 = 35
c) 3 ⋅ ( x + 2 ) = 15
d) 10 . x + 15 . 11 = 20 . 10
e) 4 . ( x + 2 ) = 3 . 4
f) 33 x + 135 = 26 . 9
g) 2 . x + 15 + 16 + 17 = 100
h) 2 . (x + 9 + 10 + 11) = 4 . 12 . 25
Tìm x
a,x^10=10^x
b, x^10=x
c, (2x-15)^5=(2x-15)^3
Tìm x
x^10=1^x
x^10= x
(2x - 15)^5 = (2x-15)^3
(-15) . x = -45
(+2) . x = -16
(-15) . x = 10.(-40)-5
(-3) . x = 2.(-7)+4
(x-3)+(x-2)+(x-1)+....+10+15=15
3.x-[-15-(-10)]=15+x
Tim số nguyên x
A:1-(4.x+13)=3-x
B:(-12)^2.x=56-(-10).13.x
C:3.x-(-15)-(-10)=15+x