NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: Algebra - Writing ExpressionsQuestion 68
Class 6 - Mathematics - Unit 7: Algebra - Writing Expressions
Question. 68
z is multiplied by –3 and the result is subtracted from 13.
Answer:
13 + 3z
Detailed Answer with Explanation:
Step 1: “z is multiplied by −3” means we take z and multiply it by −3.
Write it as:
\[ z \times (-3) = -3z \]
Step 2: “the result is subtracted from 13” means we start with 13 and subtract the result we just got.
Write it as:
\[ 13 - (-3z) \]
Step 3: Subtracting a negative is the same as adding a positive.
So:
\[ 13 - (-3z) = 13 + 3z \]
Final expression: \(13 + 3z\). This matches the given answer.