What is the answer to 2x(x+3)=2x^2+15 ?

The answer to 2x(x+3)=2x^2+15 is x= 5/2

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2x(x+3)=2x^2+15

2 x (x + 3) = 2 x^{2} + 15

x = \frac{5}{2}

Decimal Notation

x = 2.5

Solution steps

2 x (x + 3) = 2 x^{2} + 15

Expand

2 x (x + 3) : 2 x^{2} + 6 x

2 x^{2} + 6 x = 2 x^{2} + 15

Move

2 x^{2}

to the left side

6 x = 15

Divide both sides by

6

x = \frac{5}{2}

9 - 2 x = 23

- 2 (2 x - 6) = - 3 x

3 (x - 7) + 5 = - 2 x - 8

4 (2 x + 3) = 68

\frac{2 y + 11}{3} = 5