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How do you solve for x in #3x + y =7#?

Answer 1

Ethan Adkins

#x=((-y+7)/3)#

To begin isolating x, use algebraic manipulation to begin moving everything to the opposite side as the x term.

Begin by moving the y term.

#(3x+y=7) = (3x=-y+7)#

Next, divide both sides by 3

#(3x=-y+7) = ((-y+7)/3)#

If you need the answer in slope intercept form just break the fractions apart and rewrite the #-y/3# term as #-1/3y#

#x=-1/3y+7/3#

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Answer 2

Hazel Anglin

To solve for ( x ) in the equation ( 3x + y = 7 ), you need to isolate ( x ) on one side of the equation. First, subtract ( y ) from both sides to move it to the other side of the equation:

[ 3x = 7 - y ]

Then, divide both sides by 3:

[ x = \frac{7 - y}{3} ]

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.