To solve the problem of finding how many pounds of materials one crate holds, Jen will use cross-multiplication. Here are the step-by-step instructions for solving the problem:
1. Set up the given proportion:
[tex]\[
\frac{5}{20} = \frac{1}{x}
\][/tex]
2. Cross multiply to eliminate the fractions:
[tex]\[
5 \cdot x = 20 \cdot 1
\][/tex]
3. Simplify the equation:
[tex]\[
5x = 20
\][/tex]
4. Solve for [tex]\( x \)[/tex] by isolating [tex]\( x \)[/tex] on one side of the equation. To do this, divide both sides by 5:
[tex]\[
x = \frac{20}{5}
\][/tex]
5. Simplify the division:
[tex]\[
x = 4
\][/tex]
Thus, one crate holds 4 pounds of materials.
The correct step described from the given options is:
Cross multiply, [tex]\( 5x = 20 \)[/tex].