Question

3x +5= 2x + 7What should you do first to isolate the variable?Click on the correct answer.Subtract 2 from both sides.Add 2x to both sides.Subtract 2x from both sides.

Answer 1

Question:

Solution:

Consider the following equation:

$3x+5\text{ = 2x+7}$

To isolate the variable, we must have the variable x on one side of the given equation. To achieve this, we can subtract to both sides of the equation 2x:

$3x+5\text{ -2x= 2x+7}-2x$

this is equivalent to:

$(3x-2x)\text{ +5 =( 2x-2x )+ 7}$

this is equivalent to:

$x\text{ + 5 = 7}$

then, we can conclude that the correct answer is:

SUBTRACT 2X FROM BOTH SIDES