4(x-3) + 7 = 13 + 3(x-5)?
回答 (11)
2009-09-22 10:49 am
✔ 最佳答案
4(x - 3) + 7 = 13 + 3(x - 5)4x - 12 = 6 + 3x - 15
x = 3
Answer: x = 3
Proof:
4(3 - 3) + 7 = 13 + 3(3 - 5)
4(0) + 7 = 13 + 3(- 2)
0 + 7 = 13 - 6
7 = 7
2009-09-22 4:52 pm
4(x-3) + 7 = 13 + 3(x-5)
4x - 12 + 7 = 13 + 3x - 15
4x - 5 = 3x - 2
4x - 3x = 5 - 2
x = 3
to check:
substitute the value we got for x:
4(x-3) + 7 = 13 + 3(x-5)
4(3-3) + 7 = 13 + 3(3-5)
4(0) + 7 = 13 + 3(-2)
7 = 13 - 6
7 = 7 <--- correct
4x - 12 + 7 = 13 + 3x - 15
4x - 5 = 3x - 2
4x - 3x = 5 - 2
x = 3
to check:
substitute the value we got for x:
4(x-3) + 7 = 13 + 3(x-5)
4(3-3) + 7 = 13 + 3(3-5)
4(0) + 7 = 13 + 3(-2)
7 = 13 - 6
7 = 7 <--- correct
2009-09-22 4:52 pm
4x-5=3x-2
4x-3x=5-2
x=3
...
4x-3x=5-2
x=3
...
2009-09-22 4:51 pm
4(x-3) + 7 = 13 + 3(x-5)
4x-12 +7 = 13 + 3x-15
4x-5 = -2 +3x
4x = 3 + 3x
x=3
do you own homework next time...
4x-12 +7 = 13 + 3x-15
4x-5 = -2 +3x
4x = 3 + 3x
x=3
do you own homework next time...
2009-09-22 4:51 pm
4(x-3)+7=13+3(x-5)
4x-12+7=13+3x-15
4x-5=3x-2
x-5=-2
x=3
4x-12+7=13+3x-15
4x-5=3x-2
x-5=-2
x=3
2009-09-22 4:53 pm
4(x - 3) + 7 = 13 + 3(x - 5)
4(x) - 4(3) + 7 = 13 + 3(x) - 3(5)
4x - 12 + 7 = 13 + 3x - 15
4x - 5 = 3x + 13 - 15
4x - 5 = 3x - 2
4x - 3x - 5 = -2
x - 5 = -2
x = 5 - 2
x = 3
4(x) - 4(3) + 7 = 13 + 3(x) - 3(5)
4x - 12 + 7 = 13 + 3x - 15
4x - 5 = 3x + 13 - 15
4x - 5 = 3x - 2
4x - 3x - 5 = -2
x - 5 = -2
x = 5 - 2
x = 3
2009-09-22 10:27 pm
4(x-3) + 7 = 13 + 3(x-5)
4x - 12 +7 = 13 + 3x-15
4x-3x = 13 +15 +12 -7
x = 33
4x - 12 +7 = 13 + 3x-15
4x-3x = 13 +15 +12 -7
x = 33
2009-09-22 8:07 pm
4(x - 3) + 7 = 13 + 3(x - 5)
4x - 12 + 7 = 13 + 3x - 15
4x - 5 = 3x - 2
x = 3.
4x - 12 + 7 = 13 + 3x - 15
4x - 5 = 3x - 2
x = 3.
2009-09-22 4:58 pm
4(x-3)+7=13+3(x-5)
4x-12+7=13+3x-15
4x-5 =3x-2
4x-3x =5-2
x=3
4x-12+7=13+3x-15
4x-5 =3x-2
4x-3x =5-2
x=3
2009-09-22 4:56 pm
4x - 5 = 3x - 2
x = 3
x = 3
收錄日期: 2021-05-01 12:45:27
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