2 answers:
- Sum of a number and c means c+5
- 3times that means 3(c+5)
So
The expression is
On solving
Answer:
3(C + 5) = 7
Step-by-step explanation:
Let C = unknown number
The <u>sum</u> of a <u>number and 5</u>:
C + 5
<u>Three times</u> the sum of a number and 5:
3(C + 5)
Three times the sum of a number and 5 <u>is 7</u>:
3(C + 5) = 7
<u>To solve</u>
Use the distributive law: a(b + c) = ab + ac
⇒ 3C + 15 = 7
Subtract 15 from both sides:
⇒ 3C = -8
Divide both sides by 3:
⇒ C = -8/3
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