x/2 +x/6 = 12?

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2006-11-20 14:11:29 · 3 answers · asked by jaynaee1990 1 in Science & Mathematics ➔ Mathematics

3 answers

x/2 + x/6 = 12

6x/12 + 2x/12 = 12
8x/12 = 12
8x =144
x = 18

2006-11-20 14:50:10 · answer #1 · answered by Texas Cowgirl 3 · 0⤊ 0⤋

x/2 +x/6 = 12 multiply all terms by 6
3x+x=72 combine like terms
4x=72 divide by 4
x=18

2006-11-20 16:01:32 · answer #2 · answered by yupchagee 7 · 0⤊ 0⤋

x/2 + x/6 = 12
3x/6 + x/6 = 12 (3x/6 = x/2, multiply both numerator and denominator by 3)
3x/6 + x/6 = 12
(3x + x)/6 = 12
4x/6 = 12
2x/3 = 12
2x = 12*3 (Multiply both sides by 3)
2x = 36
x = 36/2 (Divide both sides by 2)
x = 18

2006-11-21 02:29:03 · answer #3 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 1⤋