Question

what is the value of u?
3u+26°
4u-39°
8u-35°
u = \\(\square\\)°
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solve linear equations: mixed review (36)
lesson: exterior angles of triangles

Explanation:

Step1: Apply exterior angle theorem

$8u - 35^\circ = (3u + 26^\circ) + (4u - 39^\circ)$

Step2: Simplify right-hand side

$8u - 35^\circ = 7u - 13^\circ$

Step3: Isolate variable u

$8u - 7u = -13^\circ + 35^\circ$

Answer:

$22$