x+4x+5=5x+5

If X+Y=5;X=4, then x=4 and y=1

If: x+(-5) = 4 Then: x = 9

(8 + 4) x 5...

x = 4

x=4

2x-4

5. Just do 9 minus 4. 5 plus 4 equals 9

5

5

5

x=4 y=5 9x+7y=?? Replace: 9(4)+7(5)= 71

2x+5=3x+1 -x=-4 x=4

4x =20x=20/4x=5

no...why would it.... it equals 2x+9

4

If x equals 2, then you first write out your equation 2x + 5 = y. You then fill out 2(2) + 5 = y. 2 x 2 = 4, so then 4 plus 5 equals 9.

x + 5 - 2x = 9 -x = 4 x = -4

-1

x=5

9

5 + (-4) = 1 x = -4

-4 (-9 +5 = -4)

x2 + 9x + 20 = 0 ∴(x + 4)(x + 5) = 0 ∴x ∈ {-5, -4}

x/-4 + 5 = -5x/-4 +5 -5 = -5 -5x/-4 = -10x/-4 x -4 = -10 x -4x = 40

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