Question

solve for x

Explanation:

Step1: Recall angle - sum property of a triangle

The sum of the interior angles of a triangle is 180°. So, we have the equation \(70 + 64+(3x + 1)=180\).

Step2: Simplify the left - hand side of the equation

First, add the constant terms: \(70+64 + 1=135\). The equation becomes \(135+3x=180\).

Step3: Isolate the variable term

Subtract 135 from both sides of the equation: \(3x=180 - 135\). So, \(3x = 45\).

Step4: Solve for x

Divide both sides of the equation by 3: \(x=\frac{45}{3}=15\).

Answer:

15