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How to do maths ncert question number 7th simplify this expression and find the values if x = 3, a = -1,b=-2
1)3a+5-8a+1?
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How to do maths ncert question number 7th simplify this expression and...
Step 1: Simplifying the Expression
To simplify the expression 3a + 5 - 8a + 1, follow these steps:
- Combine like terms:
- The terms involving 'a' are 3a and -8a.
- Combine them: 3a - 8a = -5a.
- Add the constant terms:
- The constant terms are 5 and 1.
- Combine them: 5 + 1 = 6.
So, the simplified expression is:
-5a + 6.
Step 2: Substitute the Values
Now, substitute the values of a, b, and x into the simplified expression:
- Given values:
- a = -1
- Substitute a into the expression:
-5(-1) + 6.
Now calculate:
-5 * -1 = 5.
So, the expression becomes:
5 + 6 = 11.
Final Result
The value of the expression 3a + 5 - 8a + 1 when a = -1 is:
11.
In conclusion, by simplifying the expression and substituting the given values, we arrived at the final value of 11.
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How to do maths ncert question number 7th simplify this expression and find the values if x = 3, a = -1,b=-2 1)3a+5-8a+1?
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