Solve for x. (13)/(2)=(39 )/(x) Answer:

Identify Cross-Multiplication: Identify the cross-multiplication that can be done with the given proportion. The proportion is (13)/(2) = (39)/(x). To solve for x, we can cross-multiply.Perform Cross-Multiplication: Perform the cross-multiplication. Cross-multiplying gives us 13 * x = 2 * 39.Simplify Multiplication: Simplify the multiplication on the right side of the equation. 2 * 39 equals 78, so the equation now is 13 * x = 78.Divide to Solve: Divide both sides of the equation by 13 to solve for x. Dividing both sides by 13 gives us x = 78 / 13.Calculate Value: Calculate the value of x. 78 divided by 13 equals 6, so x = 6.

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Math Problems

Grade 7

Solve two-step equations with parentheses

Full solution

Q. Solve for

\mathrm{x}

\newline

\frac{13}{2}=\frac{39}{x}

\newline

Answer:

Identify Cross-Multiplication: Identify the cross-multiplication that can be done with the given proportion. The proportion is $(13)/(2) = (39)/(x)$ . To solve for $x$ , we can cross-multiply.
Perform Cross-Multiplication: Perform the cross-multiplication. Cross-multiplying gives us $13 \times x = 2 \times 39$ .
Simplify Multiplication: Simplify the multiplication on the right side of the equation. $\newline$ $2 \times 39 = 78$ , so the equation now is $13 \times x = 78$ .
Divide to Solve: Divide both sides of the equation by $13$ to solve for $x$ . $\newline$ Dividing both sides by $13$ gives us $x = \frac{78}{13}$ .
Calculate Value: Calculate the value of $x$ . $\frac{78}{13} = 6$ , so $x = 6$ .