Question

What is algebraic expression for a number increased by 13 is 1,989.​

Answer 1

Let the variable n represent the unknown number

• Start with n

$\tt \longrightarrow \: n$

• Increased by 13 means add 13 to it

$\tt \longrightarrow \: n + 13$

• Is 1989 means it equals 1989

$\tt \longrightarrow \: n + 13 = 1989$

➪ Thus, The final equation is (n+13=1989)

Answer 2

Answer:

expression: x + 13 = 1989

explanation:

Let the number be x

so when this number is increased " + " by 13, it equals to 1989

processing:

• x + 13 = 1989

• x = 1989 - 13

• x = 1976

The number is 1976.

The algebraic equation used: x + 13 = 1989