Answer:
19) x=10⁰ 20) x=17⁰
Explanation:
19) angles in a straight line add upto 180⁰
6x-10⁰+4x⁰+6+7x+14⁰=180⁰
collect like terms
17x+10⁰=180⁰
17x=1170⁰
x=10⁰
20)58⁰ alternates with 4x-10 therefore;
4x-10⁰=58⁰
4x=58⁰+10⁰
4x=68⁰
x= 17⁰
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