Q: 2x plus 5 times x plus 2?

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

2x+2=x+5 x=3

2x + 7 + 5 = 2x + 12 = 2*x + 2*6 = 2*(x+6)

18x + 5

2x+3 = 3x+5 2x-3x = 5-3 -x = 2 x = -2

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

That's not real clear. It could be 2 times positive 1 (which is 2) plus 5, which equals 7. It could be 2x + 1 + 5 which equals 2x + 6 It could be 2x + 1 = 5, in which case x = 2

f(x)= (x-7) /(-2x+7)(2x+5) set -2x+7=0 -2x=-7 x=7/2 set 2x+5=0 2x=-5 x=-5/2 x=7/2 and x=-5/2 are vertical asymptotes.

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

4x + 2 = 2x + 5 Subtract through by 2x 2x + 2 = 5 Subtract through by 2 2x = 3 Divide through by 2 x = 1.5 ■

2x+2=x+5 x=3

2x + 7 + 5 = 2x + 12 = 2*x + 2*6 = 2*(x+6)

Simplify 4x + 3 = 2x + 8 2x = 5 x =2½

18x + 5

2x+3 = 3x+5 2x-3x = 5-3 -x = 2 x = -2

If you have an equation of x2 plus x2, it is the same as saying 2 times x plus 2 times x. This can be written as 2x + 2x or x2 + x2. It is the same, then, as 4x. For example, if x equals 5: 2(5) + 2(5) = 10 + 10 = 20. 20 also equals 4(5).

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