Question

find the value of x in 3 (x+2)=18​

Answer 1

Answer:

3x+6=18

3x=18-6

3x=12

x=12/3

x= 4 is a right answer

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Answer 2

Answer:

To solve the given linear equation, x + (3x - 2) = 18, for the variable x, begin removing the parentheses on the left side as follows:

x + (3x - 2) = 18 (Given)

x + 3x - 2 = 18

NOTE: (3x - 2) = 1(3x - 2) = 1(3x) - 1(2) = 3x - 2

Now, collecting like-terms on the left side, we get:

4x - 2 = 18

Now, add 2 to both sides of the equation in order to begin isolating the variable x on one side, in this case the left side, as follows:

4x - 2 + 2 = 18 + 2

4x + 0 = 20

4x = 20

Now, divide both sides of the equation by 4 in order to isolate x on the left side, thus finally solving the equation for x as follows:

(4x)/4 = 20/4

(4/4)x = 20/4

(1)x = 5

x = 5

CHECK (ALWAYS PERFORM THIS STEP, AND DO SO BACK IN THE ORIGINAL, GIVEN EQUATION!):

x + (3x - 2) = 18

5 + (3(5) - 2) = 18

5 + (15 - 2) = 18

5 + (13) = 18

5 + 13 = 18

18 = 18

Therefore, x = 5 is indeed the solution to the given equation

Step-by-step explanation:

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