-6.(1 - x) + 5.(2 - 5.x) = 42
=> -6 + 6x + 10 - 25x = 42
=> 4 -19x = 42
=> 19x = 4 - 42
=> 19x = -38
=> x = -38 : 19
=> x = -2
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TÌM X BIẾT
a)\(2.\left(3-6x\right)+8\left(x-5\right)=-42\)
b) \(5x-\left(3x+1\right)=4-\frac{1}{3}+x\)
jup mik với mn
A) 78-2x=42
B)6x+39=75
C) 2^3.x+ 2.x=25.2^2
D) 21+7x = 56
E) 5x +2x = 6^2-5^0
F)15x + 3x = 450 : 2+9
G) 6x+x=5^11: 5^9+3^1
H) 5x + 3x=3^11: 3^8.4+12
i) 2^3.x + 2^2.x =136-2^20 : 2^16
j) 7x -x= 5^21: 5^19+3.2^2
k) 7x - 2x= 6^17: 6^15 + 44 :11
l) 0: x =0 m) 3^x=27 n) 4^x= 64
o) 2^x = 32 p) 9^x-1=81 q) x^4=16
r) 3^x :3^
p) 9^x-1=81
q) x^4=165=1
f/ 11x(X+2) = 5xX + 40
g/ 11x(X-6) = 4xX + 11
h/ (3xX - 4) : X + 10 = 12
k/ (5xX + 7) : X + 20 = 26
m/ Xx1999 - X = 1999x1997+1999
f/ 11x(X+2) = 5xX + 40
g/ 11x(X-6) = 4xX + 11
h/ (3xX - 4) : X + 10 = 12
k/ (5xX + 7) : X + 20 = 26
m/ Xx1999 - X = 1999x1997+1999
5x+5x+1+5x+2+5x+3=1+2+3+...+87+88-42
A.8 × 3x= 24. .3 × 2 x+1- 5 = 19 C.5x+ 17 = 42
Tìm x,biết:2/5:3/5xX+4/7=1/3+4/7