Question

determine a solução da equação 3x - Y = 3, para x = 1/2
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Answer 1

Explicação passo-a-passo:

$3x - y = 3 \\ 3 \times \frac{1}{2} - y= = 3 \\ \frac{3}{2} - y = 3 \\ \frac{3}{2} - 3 = y \\ 3 - 6 = 2y \\ - 3 = 2y \\ - \frac{ 3}{2} = y$

Answer 2

$3x - Y = 3\\\\\frac{1}{2}\\\\3\cdot \frac{1}{2}-y=3\\\\\mathrm{Subtrair\:}3\cdot \frac{1}{2}\mathrm{\:de\:ambos\:os\:lados}\\\\3\cdot \frac{1}{2}-y-3\cdot \frac{1}{2}=3-3\cdot \frac{1}{2}\\\\3\cdot \frac{1}{2}-y-3\cdot \frac{1}{2}\\\\-y\\\\3-3\cdot \frac{1}{2}=3\cdot \frac{1}{2}=\frac{1\cdot \:3}{2}=\frac{3}{2}\\\\3-\frac{3}{2}=\frac{3\cdot \:2}{2}-\frac{3}{2}=\frac{3\cdot \:2-3}{2}\\\\3\cdot \:2=6-3=3\\\\-y=\frac{3}{2}=\frac{-y}{-1}=\frac{\frac{3}{2}}{-1}=\\\\y=-\frac{3}{2}$