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Earn +20 ptsQ: A equals 3b - 4 and a plus b equals 16?
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A equals 3b - 4 a plus b equals 16 What is a and b?
a = 11 and b = 5.
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What is the ordered pair of a equals 3b - 4 and a plus b equals 16?
Write down both equations (I'll label them (1) and (2)):(1) a = 3b - 4(2) a + b = 16Pass b to the left side of the equation (1):(1) a - 3b = -4(2) a + b = 16Multiply (1) by -1:(1) -a + 3b = 4(2) a + b = 16Add down both equations:-a + 3b + a + b = 4 + 164b = 20b = 5Replace b in (2):a + 5 = 16a = 11
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