Toán Lớp 6: { [ ( 2x + 14 ) : 2 mũ 2 – 3 ] : 2 } – 1 = 0
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Toán Lớp 6: { [ ( 2x + 14 ) : 2 mũ 2 – 3 ] : 2 } – 1 = 0
tìm x
Comments ( 2 )
=>[(2x+14):4-3]:2=0+1
=>[(2x+14):4-3]:2=1
=>(2x+14):4-3=1xx2
=>(2x+14):4-3=2
=>(2x+14):4=2+3
=>(2x+14):4=5
=>2x+14=5xx4
=>2x+14=20
=>2x=20-14
=>2x=6
=>x=6:2
=>x=3
Vậy x=3