<=> 2x - 3 + 5x = 4x + 12
2x - 3 + 5x = 4x + 12
<=> 2x + 5x - 4x = 12 + 3
<=> 3x = 15 <=> x = 5
3x = 15 <=> x = 5
Phương trình có nghiệm là: x = 5
2x-(3-5)=4(x+3)
2x-3+5=4x+12
2x+4x=12+3-5
6x=10
x=10/6
x=5/3
2x-(3-5x)=4(x+3)
=>2x-3+5x=4x+12
=>2x+5x-4x=12+3
=>3x=15
=>x=5