Solve the eqution 2x+3=9 using trial method.
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Answer:
x=3
Step-by-step explanation:
Let x = 1,
2x+3=9,
2×1+3=9,
2+3=9,
5 is not equal to 9
Therefore, x is not 1.
Let x = 2,
2x+3=9,
2×2+3=9,
4+3=9,
7 is not equal to 9
Therefore, x is not 2.
Let x = 3,
2x+3=9,
2×3+3=9,
6+3=9
9=9
Therefore, x is 3.
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To solve:
- The eqution 2x+3=9 using trial method.
Solution:
Let's understand the concept first! Here we are asked to solve the equation 2x + 3 = 9 using the trial and error method. In the trial and error method we assume values for x and substitute it in the equation. We continue doing this untill the equation is satisfied.
If x = 1
- f(x) = 2x + 3 = 9
- f(1) = 2(1) + 3 = 9
- f(1) = 2+3 = 9
- f(1) = 5 ≠ 9
∴ x ≠ 1
If x = 2
- f(x) = 2x + 3 = 9
- f(2) = 2(2) + 3 = 9
- f(2) = 4 + 3 = 9
- f(2) = 7 ≠ 9
∴ x ≠ 2
If x = 3
- f(x) = 2x + 3 = 9
- f(3) = 2(3) + 3 = 9
- f(3) = 6 + 3 = 9
- f(3) = 9 = 9
- LHS = RHS
∴ x = 3
∴ The value of x = 3
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