Question

Write an algebraic expression for statement "Take a number.After adding $9$ to it and then multiply by $7$". Also, find out the values of expression by substituting values $1,2,3,4$ and $5$ for the unknown variables.

Answer 1

Step-1: For writing an algebraic expression for the given statement :

Let a number be $x$

An algebraic expression for statement "Take a number.After adding $9$ to it and then multiply by $7$ " $=(x+9)\times 7=7x+63$

Step-2: For finding values in expression:

By substituting values of $x=1,2,3,4$ and $5$ in expression $7x+63$

For $x=1,7x+63=7\times 1+63=7+63=70$

For $x=2,7x+63=7\times 2+63=14+63=77$

For $x=3,7x+63=7\times 3+63=21+63=84$

For $x=4,7x+63=7\times 4+63=28+63=91$

For $x=5,7x+63=7\times 5+63=35+63=98$

Thus, the values of expression $7x+63$ by substituting values $x=1,2,3,4$ and $5$ is $70,77,84,91,98$.

Hence, the expression for given statement is $7x+63$ and the values of expression $7x+63$ by substituting values $x=1,2,3,4$ and $5$ is $70,77,84,91,98$.