SOLUTION: I am asking for help,please.
simplify: (5x^-7x+2)-(8-4x)
the 5x^ means 5x square
solve: 12/x+4 = 2+ x/x+4
the / represents the fraction line
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Question 153340: I am asking for help,please.
simplify: (5x^-7x+2)-(8-4x)
the 5x^ means 5x square
solve: 12/x+4 = 2+ x/x+4
the / represents the fraction line
Found 2 solutions by stanbon, mangopeeler07:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
simplify: (5x^2-7x+2)-(8-4x)
= 5x^2 - 7x + 2 - 8 + 4x
= 5x^2 - 3x - 6
==========================
solve: 12/x+4 = 2+ x/x+4
12/(x+4) = x/(x+4)
Since the denominators are the same, the numerators are equal.
x = 12
============
Cheers,
Stan H.
Answer by mangopeeler07(462) (Show Source): You can put this solution on YOUR website!
1. (5x^2-7x+2)-(8-4x)
Distribute the -:
5x^2-7x+2-8+4x
Combine like terms
5x^2-3x-6
--------------------------------------------------------------------------
2. If 12/x+4 = (2+ x)/x+4:
Cancel the denominators
12=2+x
Subtract 2 from both sides
10=x
--------------------------------------------------------------
If 12/x+4=2/1 + x/x+4:
Subtract x/x+4 from both sides
12-x/x+4=2/1
Cross multiply
12-x=2(x+4)
Distribute
12-x=2x+8
Add x to both sides
12=3x+8
Subtract 8 from both sides
4=3x
Divide both sides by 3
4/3=x
-----------------------------------------------------------------------
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