Answer:
B. 31°; 106° and 43°.
Explanation:
1) the rule is:
(5x-7)+(3x+1)+(11x-4)=180°;
2) if to solve this equation, then x=10°;
3) if x=10, then after the substitution the answer is 43;31;106.
1.6m questions
2.0m answers