Problem

QUESTION 3
Use a proportion to solve the problem.
If a spring stretches 6 meters when a 7-kilogram weight is attached to it, how much will it stretch when a 42-kilogram weight is attached to it?
$35 m$
$39 m$
$38 m$
$36 m$

Answer

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Answer

$x = 36$

Steps

Step 1 ： $\frac{6}{7} = \frac{x}{42}$

Step 2 ： $x = \frac{6 \times 42}{7}$

Step 3 ： $x = 36$

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