12. In the given figure, if 3a-2b=0, then find √P and √R
P=(2a+36)°
R=(4a-6)°
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Answer:
3a+2b=13
4a−2b=8
____________
7a+0=21
a=
7
21
=3
So 3(3)+2b=13
2b=13−9
b=
2
4
=2
So, a+b=3+2=5.
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