Question

question
the measures of the angles of a triangle are shown in the figure below. solve for x.
answer

Explanation:

Step1: Sum of triangle angles is 180°

$60^\circ + 90^\circ + (7x - 12)^\circ = 180^\circ$

Step2: Simplify the equation

$138 + 7x = 180$

Step3: Solve for x

$7x = 42$
$x = 6$

Answer:

6