Respuesta :

1. 3x - 2y = 8 Subtract 3x on both sides

-2y = 8 - 3x Divide by -2 on both sides to get y by itself

y = -4 + 3/2x


2. a + b / 3 = 5 Multiply 3 on both sides

a + b = 15 Subtract a on both sides to get b by itself

b = 15 - a


3. 12x - 4y = 20 Subtract -12x on both sides

-4y = 20 - 12x Divide -4 on both sides to get y by itself

y = -5 + 3x


4. y + 3 = -5(x - 2) Multiply -5 to (x-2)

y + 3 = -5x + 10 Subtract 3 on both sides to get y by itself

y = -5x + 7
[tex]3x - 2y = 8 \\ - 2y = - 3x + 8 \\ y = \frac{3}{2} x + 4[/tex]
can be applied for 1 ,3, and 4
[tex] \frac{a + b}{3} = 5 \\ a + b = 5 \times 3 \\ 15 - a = b[/tex]

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