Question

X-7=15 + 3x how to solve step by sep

Answer 1

Step 1: Simplify both sides of the equation.

x−7=15+3x

x+−7=15+3x

x−7=3x+15

Step 2: Subtract 3x from both sides.

x−7−3x=3x+15−3x

−2x−7=15

Step 3: Add 7 to both sides.

−2x−7+7=15+7

−2x=22

Step 4: Divide both sides by -2.

−2x/−2=22/−2

x=−11

Answer 2

Answer: $x=.14.5$

Step-by-step explanation:

First, we need to get rid of the x on one side so the equation becomes solvable. Since one x has a coefficent and one doesn't, let's use the one without.

Remember that x and 1x are the same thing, since anything multiplied by one is itself.

$3x - 1x - 2x$

So now we have-

$-7 = 15 + 2x$

Now it looks a little easier, right? First we get rid of the 15-

$15-15 =0\\-7-15 =-22$

So now we have-

$-22 = 2x$

Let's get rid of the coefficent now by dividing by two.

$\frac{2x}{2} =x\\\frac{-22}{2} =-14.5$

So $x=.14.5$