math geniuses!!! pls help me!!!!?

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math geniuses!!! pls help me!!!!?

x/2 + 3x/4 = 10

pls show step thoroughly. THANKS!!!

2007-01-15 14:15:22 · 4 answers · asked by Orange? 4 in Science & Mathematics ➔ Mathematics

4 answers

x/2 + 3x/4 = 10
2x/4 + 3x/4 = 10
(2x + 3x) = 10(4)
5x = 40
x = 8

2007-01-15 14:43:48 · answer #1 · answered by wind_liao 2 · 0⤊ 0⤋

Ok, I'll bite. First multiply everything by the common denominator, which is 4. Then you get 2x + 3x = 40
so 5x = 40
so x = 40/5 = 8.
Check::
(8/2) + (3x8)/4 = 4 + (24/4) = 4 + 6 = 10

2007-01-15 22:45:50 · answer #2 · answered by Joni DaNerd 6 · 0⤊ 0⤋

x=8

2007-01-15 22:31:45 · answer #3 · answered by Samantha S 2 · 0⤊ 0⤋

find the common denominator for x/2 + 3x/4
it is (4x+6x)/8 = 10
cross multiply

4x+6x = 80
10x = 80
x=8

2007-01-16 04:53:52 · answer #4 · answered by ladysarah 2 · 0⤊ 0⤋