Giải các phương trình sau :
a. 3x - 2 (5 + 2x) = 45 - 2x
b. x−35 =6−1−2x3
c.5(x−1)+26 −7x−14 =2(2x+1)7 −5
d. (x - 1) (5x + 3) = (3x - 8) (x - 1)
e. (x - 1) (x2 + 5x - 2) - (x3 - 1) = 0
f.x−1733 +x−2129 +x25 =4
g. x+165 +x+363 =x+161 +x+759
h.x+52015 +x+42014 +x+41002 +x+61003 =6
k.
Căng =( mình làm mấy ý ez thôi nhá, còn mấy ý kia tương tự
a, \(3x-2\left(5+2x\right)=45-2x\)
\(\Leftrightarrow3x-10-4x=45-2x\)
\(\Leftrightarrow-x-10=45-2x\Leftrightarrow x=55\)
d, \(\left(x-1\right)\left(5x+3\right)=\left(3x-8\right)\left(x-1\right)\)
\(\Leftrightarrow\left(x-1\right)\left(5x+3\right)-\left(3x-8\right)\left(x-1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(5x+3-3x+8\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(2x+11\right)=0\Leftrightarrow x=1;-\frac{11}{2}\)
e, \(\left(x-1\right)\left(x^2+5x-2\right)-\left(x^3-1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(x^2+5x-2\right)-\left(x-1\right)\left(x^2+x+1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(x^2+5x-2-x^2-x-1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(4x-3\right)=0\Leftrightarrow x=1;\frac{3}{4}\)