Question

3x + 21 = 18. help me with this question pls

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Answer 1

• We have to evaluate the above expression by using the given data.

              Given data:- $3x+21=18.$

              To find:- Value of the expression.

              Solution:-

• Here, we will use the below following steps to find a solution using the transposition method.

• Here we will use the transposition method.

• Transposition is one of the linear equations.

• To solve the transposition method we wi.ll Identify the variables and constants.

• Then we Simplify the equation in LHS and RHS.

• Now Simplify the equation using arithmetic operations.

        By using the transposition method.

            we get,

                  $3x+21=18\\\Rightarrow 3x=18-21\\\Rightarrow 3x=-3\\\Rightarrow x=-\frac{3}{3}\\\Rightarrow x=-1.$

       Hence we will get the value $x=-1.$

Answer 2

In context to question asked,

We have to determine the value of "x" in the above given expression.

As per question,

We have,

$3x+21=18$

So, for determining the value of "x" we will shift 21 from LHS to RHS of the equation.

Hence, we will get,

$3x +21=18\\=>3x = 18-21\\=>3x = -3\\=>x = -\frac{3}{3} = -1$

Hence, we will get the value of "x' as -1.