Problem
Each member of a research group visited either the Virgin Islands or Hawaii...
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So What?
Math questions involving two equations and two unknowns can usually be combined into one equation with one unknown.
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PSAT: Grid In Question #2 |
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Question:
Given 2y + 4x = 24, find x when y = 2.
The correct answer is 5. Substitute 2 for y and then solve for x:
2y + 4x
=24
2(2) + 4x
=24
4 + 4x
=24
4x
=20
x
=5
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