Solve the Problem by Using a System of Equations

question 210

Multiple Choice

Solve the problem by using a system of equations. The tens digit of a two-digit number is 7 less than three times the units digit. If the sum of the digits is 9, find the number.

• A) 57
• B) 54
• C) 45
• D) 48

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Definitions:

Organizing Tactic

Strategies or methods employed to arrange or structure information, groups, or physical spaces effectively.

Working Memory

A cognitive system responsible for the temporary holding and processing of information needed for complex cognitive tasks like learning, reasoning, and comprehension.

Sensory Memory

The shortest-term element of memory which acts as a buffer for stimuli received through the senses.

Memory Skill

The ability to encode, store, and retrieve information effectively from one's mind.