Đáp án:
a)2(x-3)=3(x+1)
=> 2x-6=3x+3
=> 2x-3x=3+6
=> -x=9
=> x=-9
b)2x-(3-5x)=4(x+3)
=> 2x-3+5x-4x-12=0
=> 3x-15=0
=> 3x=15
=> x= 5
c)5-(6-x)=4(3-2x)
=> 5-6+x-12+8x=0
=> 9x-13=0
=> x= 13/9
2) a) (3x-1)(x+3)=(2-x)(5-3x)
=> 3x²+9x-x-3=10-6x-5x+3x²=0
=> 19x=13
=> x=13/19
b)(x+5)(2x-1)=(2x-3)(x+1)
= 2x²-x+10x-5=2x²+2x-3x-3
=> 2x²-x+10x-5-2x²-2x+3x+3=0
=> 10x-2=0
=> x= 1/5
BẠN THAM KHẢO NHA!!!