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OpenStudy (anonymous):
Solve for the variable. 78 + b = 40
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OpenStudy (ashleyisakitty):
-38!
OpenStudy (anonymous):
78 - 78 = 0 They cancel out. So the variable is now alone. Then you would do 40 - 78 = -38. You subtracted because it was the opposite operation of addition. :) b = -38
OpenStudy (anonymous):
40 minus 78
OpenStudy (anonymous):
-38 lol
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