Solve for x. (3)/(5)=(15 )/(x) Answer:

Identify Cross-Multiplication: Identify the cross-multiplication that can be done with the given proportion. Since we have a proportion (3/5) = (15/x), we can cross-multiply to find the value of x.Perform Cross-Multiplication: Perform the cross-multiplication. Cross-multiplying gives us 3 * x = 5 * 15.Simplify Equation: Simplify the equation from Step 2. This simplifies to 3x = 75.Solve for x: Solve for x by dividing both sides of the equation by 3. Dividing both sides by 3 gives us x = 75 / 3.Calculate x: Calculate the value of x. Calculating 75 / 3 gives us x = 25.

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Math Problems

Grade 7

Solve two-step equations with parentheses

Full solution

Q. Solve for

\mathrm{x}

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\frac{3}{5}=\frac{15}{x}

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Answer:

Identify Cross-Multiplication: Identify the cross-multiplication that can be done with the given proportion. $\newline$ Since we have a proportion $(\frac{3}{5}) = (\frac{15}{x})$ , we can cross-multiply to find the value of $x$ .
Perform Cross-Multiplication: Perform the cross-multiplication. Cross-multiplying gives us $3 \times x = 5 \times 15$ .
Simplify Equation: Simplify the equation from Step $2$ . $\newline$ This simplifies to $3x = 75$ .
Solve for x: Solve for x by dividing both sides of the equation by $3$ . Dividing both sides by $3$ gives us $x = 75 / 3$ .
Calculate $x$ : Calculate the value of $x$ . $\newline$ Calculating $\frac{75}{3}$ gives us $x = 25$ .