Answer
m$\angle$ 1 = 34$^{\circ}$
Work Step by Step
Step 1: m$\angle$ 1 + m$\angle$ 2 = m$\angle$ ABC.
Step 2: Since m$\angle$ 1 = m$\angle$ 2; Substitute x for m$\angle$ 1, x for m$\angle$ 2, and 68 for m$\angle$ ABC.
x + x = 68
Step 3: Simplify the left side of the equation.
2x = 68
Step 4: Divide both sides by 2.
$\frac{2x}{2}$ = $\frac{68}{2}$
Step 5: Solve. x = 34. Since x = 34, then m$\angle$ 1 - 34$^{\circ}$.
