Question

which equation can be used to solve for x? 39x = 90, 39x = 180, 3x + 36 = 180, 3x + 36 = 90. solve for x. x =

Explanation:

Step1: Identify angle - sum relationship

The two angles \(3x\) and \(36^{\circ}\) are complementary (since they form a right - angle which is \(90^{\circ}\)). So the equation is \(3x + 36=90\).

Step2: Solve the equation for \(x\)

Subtract 36 from both sides of the equation \(3x+36 = 90\). We get \(3x=90 - 36\), so \(3x = 54\).

Step3: Isolate \(x\)

Divide both sides of the equation \(3x = 54\) by 3. So \(x=\frac{54}{3}=18\).

Answer:

\(x = 18\)