Respuesta :

gavinmartin75

Answer:

x = 3

Step-by-step explanation:

3x + y = 15

Using substitution

3x + 2x = 15

5x = 15

x=3

yangtiffany431

Answer:

x=3

Step-by-step explanation:

Substitute y with 2x meaning that your equation is now: 3x+2x=15

Now you combine like terms: 5x=15

Next, you isolate the variable by dividing both sides by 5.

Your final should be x=3

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