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OpenStudy (anonymous):
Evaluate 2a - b for a = 2 and b = 3.
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jimthompson5910 (jim_thompson5910):
a = 2 so you replace EVERY copy of 'a' with 2 b = 3 so you replace EVERY copy of 'b' with 3
jimthompson5910 (jim_thompson5910):
2a-b turns into 2*(2) - (3) = 4 - 3 = 1 therefore, 2a-b = 1 when a = 2 and b = 3
OpenStudy (anonymous):
thanks
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