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boyakko [2]
2 years ago
10

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

Mathematics
2 answers:
SpyIntel [72]2 years ago
7 0

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

<u>➪</u><u> </u><em>T</em><em>h</em><em>u</em><em>s</em><em>,</em><em> </em><em>T</em><em>h</em><em>e</em><em> </em><em>f</em><em>i</em><em>n</em><em>a</em><em>l</em><em> </em><em>e</em><em>q</em><em>u</em><em>a</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>i</em><em>s</em><em> </em><em>(</em><em>n</em><em>+</em><em>1</em><em>3</em><em>=</em><em>1</em><em>9</em><em>8</em><em>9</em><em>)</em>

White raven [17]2 years ago
4 0

Answer:

expression: x + 13 = 1989

explanation:

Let the number be x

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

<u>processing</u>:

  • x + 13 = 1989
  • x = 1989 - 13
  • x = 1976

The number is 1976.

The algebraic equation used: x + 13 = 1989

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