Question

two angles of a triangle are 5x+20 and 2x+30 find the third angles​

Answer 1

Answer:

Third angle is $130-7x$

Step-by-step explanation:

We have sum of angles is $180^{0}$

Let the third angle be $y$

Hence

$5x+20+2x+30+y=180\\\\y=130-7x$

Third angle is $130-7x$