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Earn +20 ptsQ: What is -2a - 9 equals 39?
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2a-20 equals -2?
Simple algebra, 2a-20 = -2 2a=18 a=18/2 a=9
2a plus 21 equals 8a-9?
2a + 21 = 8a - 9Add 9 to each side:2a + 30 = 8aSubtract 2a from each side:30 = 6aDivide each side by 6:5 = a
6a - 5b equals 9 2a plus 5b equals 23?
(4, 3)
A plus a plus a-2a equals?
a + a + a - 2a = 3a - 2a = a
What is the answer to 39 equals 5x plus 9?
39 = 5x + 9 5x = 39 - 9 5x = 30 x = 30 / 5 x = 6
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