Identify Cross-Multiplication: Identify the cross-multiplication that can be done with the given equation.We have the equation −132=39x. To solve for x, we can cross-multiply the terms.
Perform Cross-Multiplication: Perform the cross-multiplication.Cross-multiplying gives us: −2×39=13×x
Simplify Left Side: Simplify the left side of the equation.Multiplying −2 by 39 gives us: −78=13×x
Divide to Solve: Divide both sides of the equation by 13 to solve for x. Dividing both sides by 13 gives us: x=13−78
Simplify Right Side: Simplify the right side of the equation.Dividing −78 by 13 gives us: x=−6
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