Answer:
Write the equation as x + 12 = 35 and subtract 12 from both sides. The answer is 23.
Step-by-step explanation:
"Sum" indicates addition. So, "the sum of a number and 12" means ...
x + 12 . . . . . . when x is used to represent "a number."
"Is" in this context means "equals". So, the direct translation from English to Math is ...
the sum of a number and 12 is 35
x + 12 = 35
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This is most easily solved by adding the opposite of 12 to both sides of the equation. Adding -12 is the same as subtracting 12. We do this to both sides, because that is required by the addition/subtraction property of equality.
x +12 -12 = 35 -12
Simplifying gives the solution:
x = 23
Comparing this process to the answer choices, we select ...
Write the equation as x + 12 = 35 and subtract 12 from both sides. The answer is 23.
