SOLUTION: find angle A if it supplements angle B which is equal to 70-x
-> SOLUTION: find angle A if it supplements angle B which is equal to 70-x
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find angle A if it supplements angle B which is equal to 70-x
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A + B = 180,,,,def supplementary
A +(70-x) =180
A + (70-x) = 180
A = 180 -70 +x
A= 110 +x
check, x=10, (70-x) =60,,,A=120,,,answer,,,110+10=120,,,,ok