Solve the equation $$7 x + 3 y - 7 = 0$$ for $y$ .
A) $y = \frac { 7 - 7 x } { 3 }$ or $y = 2.33 - 2.33 x$

B) $y = \frac { 7 + 7 x } { 3 }$ or $y = 2.33 + 2.33 x$

C) $y = \frac { 7 x - 7 } { 3 }$ or $y = 2.33 x - 7$

D) None of the above.

Question

Solve the equation $$7 x + 3 y - 7 = 0$$ for $y$ . 
A) $y = \frac { 7 - 7 x } { 3 }$ or $y = 2.33 - 2.33 x$

B) $y = \frac { 7 + 7 x } { 3 }$ or $y = 2.33 + 2.33 x$

C) $y = \frac { 7 x - 7 } { 3 }$ or $y = 2.33 x - 7$

D) None of the above.

Quizplus · Accepted Answer

First, isolate the term with $y$ by subtracting 7 and then dividing by 3: $$7x + 3y - 7 = 0 \implies 3y = -7x + 7 \implies y = \frac{7-7x}{3}$$ This is the only option in A, so it must be the answer. The second option in A, $y = 2.33 - 2.33x$, is equivalent to the answer when simplified, so it is also correct. Option B is incorrect because it has a positive sign in front of the $7x$ when it should be negative to match the given equation. Option C is also incorrect because it has a subtraction of 7 in the numerator instead of the denominator, which changes the value of y.

Solve the Equation 7x+3y−7=07 x + 3 y - 7 = 07x+3y−7=0

Solve the Equation $7 x + 3 y - 7 = 0$