Answer:
61
Step-by-step explanation:
A triangle's total degrees is 180. You add the two angles they give you and then subtract the sum from 180. In number 9, the answer is 61. 47+72=119, 180-119= 61.
<h3>The solution is (1, -3) or (-1, -3)</h3>
<em><u>Solution:</u></em>
Given that,

We have to find the solution (x, y)
<em><u>Substitute eqn 2 in eqn 1</u></em>


Thus, we get,
x = 1
x = -1
Thus the solution is (1, -3) or (-1, -3)
-1 you change all the x values to -1 and then solve