Solve Linear Equation: 2x+7-5x-12=-8x+3 Step by Step

Solve the following problem:

2x+75x12=8x+3 2x+7-5x-12=-8x+3

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:09 Let's start by solving the equation.
00:14 First, we need to collect like terms together.
00:30 Our goal is to have the unknown, X, alone on one side.
00:46 Let's collect the terms again to simplify the equation.
00:53 Now, we reduce what we can to make it simpler.
00:59 Next, we need to isolate the unknown, X.
01:21 Keep reducing until we can't anymore.
01:25 And there you go! That's how we find the solution.

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following problem:

2x+75x12=8x+3 2x+7-5x-12=-8x+3

2

Step-by-step solution

In order to solve this exercise, we first need to identify that we have an equation with an unknown.

To solve such equations, the first step will be to arrange the equation so that on one side we have the numbers and on the other side the unknowns.

2X+75X12=8X+3 2X+7-5X-12=-8X+3

First, we'll move all unknowns to one side.
It's important to remember that when moving terms, the sign of the number changes (from negative to positive or vice versa).

2X+75X12+8X=3 2X+7-5X-12+8X=3

Now we'll do the same thing with the regular numbers.

2X5X+8X=37+12 2X-5X+8X=3-7+12

In the next step, we'll calculate the numbers according to the addition and subtraction signs.

2X5X=3X 2X-5X=-3X
3X+8X=5X -3X+8X=5X

37=4 3-7=-4
4+12=8 -4+12=8

5X=8 5X=8

At this stage, we want to reach a state where we have only one X X , not 5X 5X ,
Thus we'll divide both sides of the equation by the coefficient of the unknown (in this case - 5).

X=85 X={8\over5}

3

Final Answer

x=85 x=\frac{8}{5}

Practice Quiz

Test your knowledge with interactive questions

\( x+7=14 \)

\( x=\text{?} \)

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