
Concept explainers
To solve: The given equation

Answer to Problem 21QC
The value of a is 2.
Explanation of Solution
Given information:
The equation is
Concept used: To get a alone, each side of the equation is divided by 3.5 and to check the solution, this value of a is put in given equation, so that the left side is equal to right side.
Calculation:
On dividing each side by 3.5,
Or,
Check:
On plug in
Right side
So, value of a calculated, is correct.
Thus, required value of a is 2.
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