2007-07-17 06:47:30 · 7 answers · asked by yuleydis77 1 in Science & Mathematics ➔ Mathematics
1/4x + 3/2x = 7
Clear both fractions. multiply both sides of the equation by 4
4(1/4x) + 4(3/2x) = 4(7)
x + 6x = 28
Collection like terms
7x = 28
divide both sides of the equation by 7
7x / 7 = 28 / 7
x = 28 / 7
x = 4
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2007-07-17 06:54:07 · answer #1 · answered by SAMUEL D 7 · 2⤊ 0⤋
I assume you mean:
1/(4x) + 3/(2x) = 7
Multiply through both sides by 4x to get rid of the fractions:
1 + 3*2 = 28x
7 = 28x
x = 7/28 = 1/4
2007-07-17 13:50:42 · answer #2 · answered by MathProf 4 · 1⤊ 0⤋
1/4x+3/2x=7
to get rid of the fractions, multiply everything by LCD
LCD=4
4(1/4x+3/2x)=4(7)
distribute 4 to everything in ()
x+6x=28
combine like terms
7x=28
divide both sides by 7
x=4
2007-07-17 13:51:05 · answer #3 · answered by Carmen 4 · 0⤊ 0⤋
1/4x+3/2x=7
1.75x=7
x=4
2007-07-17 13:49:58 · answer #4 · answered by Dill 4 · 1⤊ 0⤋
i got 4
2007-07-17 13:50:22 · answer #5 · answered by poohbear5312 1 · 0⤊ 0⤋
4 - follow Samuel D - he did it the way I did.
2007-07-17 13:55:38 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Are you having us do your homework?
2007-07-17 13:56:34 · answer #7 · answered by Chris 3 · 0⤊ 0⤋