Answer: 5
Step-by-step explanation: 3x=15 x=5.
[tex]3x + 2y = 15[/tex]
[tex]3x = 15 - 2y[/tex]
[tex]x = \frac{15 - 2y}{3} [/tex]
[tex]x = \frac{ - 2y}{3} + 5[/tex]
[tex]x = - \frac{2y}{3} + 5[/tex]
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