更新1:
2. the permiter of a rectangle is 30 feet. and its twice its width. what is the length, in feet, of the rectangle. a. 5 b. 10 c. 30 d. /15 e. 2/15
if 3x-7+4(x+3)=26 then x = ?
回答 (9)
2008-02-14 2:16 pm
✔ 最佳答案
3x-7+4(x+3)=263x - 7 + 4x + 12 = 26
7x + 5 = 26
7x = 21
x = 3
2008-02-18 11:22 pm
3x - 7 + 4x + 12 = 26
7x = 21
x = 3
7x = 21
x = 3
2008-02-14 10:16 pm
3x-7+4x+12=26
7x=21
x=3
7x=21
x=3
2008-02-14 10:16 pm
3x-7+4(x+3)=26
3x + 4(x+3) = 33
3x + 4x + 12 = 33
7x = 21
x = 3
3x + 4(x+3) = 33
3x + 4x + 12 = 33
7x = 21
x = 3
2008-02-14 10:21 pm
3x-7+4x+12=26
7x+5=26
7x=26-5=21
x=21/7
x=3
7x+5=26
7x=26-5=21
x=21/7
x=3
2008-02-14 10:24 pm
3x-7+4(x+3)=26
3x - 7+4(x+3) = 26
3x - 7+4x + 12 =26
7x = 26-5
x = 3
3x - 7+4(x+3) = 26
3x - 7+4x + 12 =26
7x = 26-5
x = 3
2008-02-14 10:22 pm
well remember you multiply the parenthesis out first
3x-7+4x+12=26
then you group like terms
7x+5=26
subtract 5 from both sides
7x=21
divide by 7 to isolate x
x=21/7
x=3
3x-7+4x+12=26
then you group like terms
7x+5=26
subtract 5 from both sides
7x=21
divide by 7 to isolate x
x=21/7
x=3
2008-02-14 10:17 pm
3x - 7 + 4(x + 3) = 26
3x - 7 + 4*x + 4*3 = 26
3x - 7 + 4x + 12 = 26
3x + 4x = 26 + 7 - 12
7x = 33 - 12
7x = 21
x = 21/7
x = 3
3x - 7 + 4*x + 4*3 = 26
3x - 7 + 4x + 12 = 26
3x + 4x = 26 + 7 - 12
7x = 33 - 12
7x = 21
x = 21/7
x = 3
2008-02-14 11:00 pm
3x-7+4x+12=26
3x+4x=26-12+7
7x=21
7x/7=21/7
x=3
3x+4x=26-12+7
7x=21
7x/7=21/7
x=3
收錄日期: 2021-05-01 10:07:44
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