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September 16, 2014

September 16, 2014

Posted by **Az** on Sunday, November 6, 2011 at 2:31pm.

a(3x+1)+b(5x-1)=11x+9 for all x€r

- algebra -
**Steve**, Monday, November 7, 2011 at 4:45amyou have

3ax + a + 5bx - b = 11x + 9

If these expressions are identical for all x, then like powers of x must be equal:

3a + 5b = 11

a - b = 9

so,

3(b+9) + 5b = 11

b = -2

a = 7

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