please answer it because tomorrow i have preannual
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A-B=63
A=63+B
B-C=18
B=18+C
A=63+B
put the value of B
A=63+18+C
A+B+C=180 (angle sum property)
63+18+C+18+C+C=180
99+3C=180
3C=180-99
3C=81
C=27
B=18+C
B=18+27
B=45
hope you understand
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