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- Let the unknown be a variable.
- Translate the statement into an equation.
- Solve and verify in options.
Correct Answer: B
Correct Answer: B
Method / Topic: Algebra
The answer satisfies the equation formed from the question.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Algebra
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">Substitute x=3 into 4x+5y=47. This gives 12+5y=47, so y=7.</span></td>
</tr>
</tbody>
</table>
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Let the unknown be a variable.
- Translate the statement into an equation.
- Solve and verify in options.
If 4x+5y=47 and x=3, find y.
Explanation
Correct Answer: B
Method / Topic: Algebra
The answer satisfies the equation formed from the question.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Algebra
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">Substitute x=3 into 4x+5y=47. This gives 12+5y=47, so y=7.</span></td>
</tr>
</tbody>
</table>
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