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Kaleb Buck
Mathematics
5 January, 10:33
What is this 15=2+4-d
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Henry Clark
5 January, 10:54
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15=2+4-d
15=6+d
move 6 to the other side
sign changes from + 6 to - 6
15-6=6-6-d
15-6=-d
9=-d
Multiply both sides by - 1 to get + d.
(9) (-1) = (-d) (-1)
Answer: d=-9
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