Question 344061
supplement angles add up to 180
A+B=180
A=2B-21 "A is 21 less than twice as large as its supplement angle B"
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i dont know if ur looking for just the expression or trying to solve for each angle?
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{{{(2B-21)+B=180}}}
{{{3B=201}}}
{{{B=67}}}
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{{{A=2B-21}}}
{{{A=2(67)-21}}}
{{{A=134-21}}}
{{{A=113}}}
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Check
{{{A+B=180}}}
{{{113+67=180}}}
{{{180=180}}}
Correct