Concept explainers
To solve:The equation x+8=21 and check the solution.
Answer to Problem 30CR
The solution of the equation is x=13 .
Explanation of Solution
Given information:
Consider, the expression provided in the question,
x+8=21
Calculation:
The solution of the equation is obtained as:
x+8=21 (Write original equation)x+8−8=21−8 (Subtract 8 from each side)x=13 (Simplify)
To check substitute x=13 in Left-hand-side of the equation and if Left-hand-side equal Right-hand-sidethen the solution is correct.
x+8 (Write Left-hand-side of the equation)13+8 (Substitute x=13)23 (Simplify)
Hence,
The solution of the equation is x=13 .
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