solve equation?

2 ⤊

a+4/2=a+4/a

2007-10-10 09:20:18 · 3 answers · asked by Pep C 1 in Science & Mathematics ➔ Mathematics

a + 4/2 = a + 4/a
Subtract a from both sides.
4/2 = 4/a
Cross-multiply.
4a = 4(2)
Divide by 4.
a = 2

2007-10-10 09:24:26 · answer #1 · answered by cbagan89 2 · 0⤊ 1⤋

Reading this as:-
(a + 4) / 2 = (a + 4) / a
a(a + 4) = 2(a + 4)
aÂ² + 2a - 8 = 0
(a + 4)(a - 2) = 0
a = 2 , a = - 4

2007-10-10 18:15:04 · answer #2 · answered by Como 7 · 1⤊ 0⤋

(a+4)/2 = (a+4)/a
Cross multiply: a (a+4) = 2(a+4)
a^2 + 4a = 2a + 8
a^2 + 2a - 8 = 0
(a-2)(a+4) = 0
a = 2, a = -4

2007-10-10 16:27:16 · answer #3 · answered by Tan Z 3 · 1⤊ 1⤋