solve 5-3x = 2(x+1)?
回答 (10)
✔ 最佳答案
5 - 3x = 2(x + 1)
5 - 3x = 2*x + 2*1
5 - 3x = 2x + 2
-2x - 3x = -5 + 2
-5x = -3
x = -3/-5
x = 3/5 (0.6)
5-3x = 2(x+1)
5 - 3x = 2x + 2
5 - 2 = 2x + 3x
3 = 5x
x = 3/5
It is very simple
5-3x=2x+2
5-2=2x+3x
3=5x
x=3/5
5-3x = 2(x+1)
to find out what x is, X has to be alone on one side of the equation (X = ...)
5-3x = 2(x+1)
5-3x = 2x + 2
now add 3x to each side
5-3x+3x = 2x + 2 + 3x
5 = 5x +2
now subtract 2 from each side
5 -2 = 5x +2 -2
3 = 5x
now divide both sides by 5
3/5 = 5x/5
0.6 = x
there you got it
now to check
5-3x = 2(x+1)
5 - 3*0.6 = 2*(0.6+1)
5-1.8 = 2*1.6
3.2 = 3.2
correct ^^
hope you understand it...
參考: me
5-3x=2(x+1)
5-3x=2x+2
5-2=2x+3x
3=5x
5x=3
x=3/5
simple algebra... make sure to expand the brackets
5-3x=2x+2
5-2=2x+3x
3=5x
x=3/5
5-2=3x+2x so 3=5x and 3/5=x. Check: (25-9)/5=2(3+5)/5.
5 - 3x = 2x + 2
3 = 5x
x = 3/5
收錄日期: 2021-05-01 10:30:22
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