Answer:
6(x + 4) = 5
Explanation:
We can break this sentence down into individual operations:
"six times" → this means 6 multiplied by some quantity
6 · ()
"the sum of a number and 4" → this is the quantity that we can put inside the parentheses (Note that "a number" is represented as a variable x, and a "sum" is the result of the addition of multiple numbers.)
6 · (x + 4)
"equals 5" → this is self-explanatory; the expression above is equal to 5
6(x + 4) = 5
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
Note that multiplication with a value inside parentheses is implied.
For example,
4(5) = 4 · 5 = 20
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
We can solve for x in this equation to solve for "a number".
6(x + 4) = 5
↓ applying the distributive property ... a(b + c) = (a · b) + (a · c)
6x + (6 · 4) = 5
↓ simplifying
6x + 24 = 5
↓ subtracting 24 from both sides
6x = -19
↓ dividing both sides by 6
x = -19/6