Toán Lớp 6: Giá trị x thoả mãn biểu thức 2x -1 = 3 – ( -x +5 )
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Toán Lớp 6: Giá trị x thoả mãn biểu thức 2x -1 = 3 – ( -x +5 )
Comments ( 2 )
2x-1=3-(-x+5)
⇔2x-1=3+x-5
⇔2x-1=x-2
⇔2x-1-x+2=0
⇔x+1=0
⇔x=-1
0w0
2x – 1 = 3 – ( -x + 5 )
=> 2x – 1 = 3 + x – 5
=> 2x – 1 + 5 – x = 3
=> x + 4 = 3
=> x = 3 – 4
=> x = -1
$Vậy$ x = -1