\(3x-30\%x=-5.4\)
\(3x-\frac{3}{10}x=-\frac{27}{5}\)
\(\left(3-\frac{3}{10}\right)x=-\frac{27}{5}\)
\(\frac{27}{10}x=-\frac{27}{5}\)
\(x=-\frac{27}{5}:\frac{27}{10}\)
\(x=-2\)
Bài 22 :
a. - 12 . ( x - 5 ) + 7 . ( 3 - x ) = 5
b. 30 . ( x + 2 ) - 6 . ( x - 5 ) - 24x = 100
Bài 23 :
a. xy - 3x = - 19
b. 3x + 4y - xy = 16
1)M = [ x∈ N/30:x]
2) P = [ x∈ N/20<x<30:3]
3) Q = [ x∈ N/x.(x-7)(3x+5)=0]
Tìm x biết
a) (x-2018).3=0
b)2018.(3x-18)=0
c)25+(15+x)=75
d)136-2(164-x)=30
e)30-(14+2x)=8
f)56:(3x-1)=7
Lưu ý: 3x là 3.x, 2x là 2.x nha
Làm ơn hãy giúp mình
a)91-5.(5+x)=61 ;b)[(x+34)-50].2=56;c)1045-[2015-(3x-24)]=5;d)[195-(3x-27)].39=4212;e)30-3(x-2)=18
A) x+20=12 ; B)25-x=-5 ; C) 22-(3x+4)=30
a) −30 − (x + 5) = −18 b) (x − 1).(4x + 16) = 0 c) x − (6 − 3x) = (−2022)1 .
Tìm x biết
a) x + 30 % x = − 1 , 3
b) 1 3 x + 2 5 x − 1 = 0
c) 3 x − 1 2 − 5 x + 3 5 = − x + 1 5
3x-30%x=5,4
tìm số nguyên x,biết:
A,-4/7=x/21
B.(x-3)/15=1/-5
C.(3x+8)/-12=-5/30
