6x + 4 = 3x + 16??????????

2008-10-07 4:22 pm
VALUE OF X?!!!!!!! arghh. i know X=4 but how do u get the answer?!
i tried adding 6x and 3x to make the equation 9x + 4 = 16,but that made no sense. especially if the answer is 4....

回答 (3)

2008-10-07 4:26 pm
✔ 最佳答案
6x + 4 = 3x + 16
6x = 3x + 16 - 4
6x = 3x + 12
6x - 3x = 12
3x = 12
x = 12/3
x = 4
2008-10-07 11:31 pm
3x=12,x=12/3=4
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CHECK:(6x4) + 4 =(3x4) +16
24+4=12+16
28=28
2008-10-07 11:27 pm
6x + 4 = 3x + 16 (subtract 4 from both sides)
6x = 3x + 12 (subtract 3x from both sides)
3x = 12 (divide both sides by 3)
x = 4


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