Solve the equation $2 x - 8 y = 9$ for $y$ .
A) $y = \frac { 9 - 2 x } { 8 }$ or $y = 1.13 - 0.25 x$

B) $y = \frac { 9 + 2 x } { 8 }$ or $y = 1.13 + 0.25 x$

C) $y = \frac { 2 x - 9 } { 8 }$ or $y = 0.25 x - 1.13$

D) None of the above.

Question

Solve the equation $2 x - 8 y = 9$ for $y$ . 
A) $y = \frac { 9 - 2 x } { 8 }$ or $y = 1.13 - 0.25 x$

B) $y = \frac { 9 + 2 x } { 8 }$ or $y = 1.13 + 0.25 x$

C) $y = \frac { 2 x - 9 } { 8 }$ or $y = 0.25 x - 1.13$

D) None of the above.

Quizplus · Accepted Answer

To solve for y, we want to isolate y on one side of the equation. First, we can add 8y to both sides:
$$2x = 8y + 9$$
Next, we can divide both sides by 8:
$$\frac{2x}{8} = \frac{8y+9}{8}$$
Simplifying, we get:
$$\frac{x}{4} = y + \frac{9}{8}$$
Subtracting 9/8 from both sides, we get:
$$y = \frac{x}{4} - \frac{9}{8}$$
This is in the same form as the first option, so we don't need to check the second option. Thus, the answer is (C).

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Solve the Equation $2 x - 8 y = 9$ For $y$