If m∠abc = 80°, what is m∠dbc? justify your reasoning.
using the angle addition postulate, 20 + m∠dbc = 80. so, m∠dbc = 60° using the subtraction property of equality.
using the angle addition postulate, 20 + 80 = m∠dbc. so, m∠dbc = 100° using the addition property of equality.
using the addition property of equality, 20 + 80 = 100, so m∠dbc = 100°.
using the subtraction property of equality, 80 − 20 = 60, so m∠dbc = 60°.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

for me what is finding a good play list and going out because i can not lay down and relax so i usually go to a coffee shop. i also use the gum trick and this actually works. another advice is highlighting subjects it really does me remember certain things

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i think it would be c

mark brainliest if im right

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