[tex]3x - 2 = 15 \\3 x = 15 + 2 \\ 3x = 17 \\ x = \frac{17}{3} [/tex]
[tex]2x + 2y = 10 \\ 2x + 2 \times 0 = 10 \\ 2x + 0 = 10 \\ 2x = 10 - 0 \\ 2x = 10 \\ x = \frac{10}{2} \\ x = 5[/tex]
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[tex]3x - 2 = 15 \\3 x = 15 + 2 \\ 3x = 17 \\ x = \frac{17}{3} [/tex]
[tex]2x + 2y = 10 \\ 2x + 2 \times 0 = 10 \\ 2x + 0 = 10 \\ 2x = 10 - 0 \\ 2x = 10 \\ x = \frac{10}{2} \\ x = 5[/tex]