3.2d + 15.75= 3.2
3.2. -15.75 -15.75
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-12.55
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3.2d
d= -3.921875
You have to do the inverse operation, so you subtract 15.75 to 15.75 then you cross those out. Then you subtract 3.2 to 15.75 which equals -12.55. After that, you divide 3.2 to 3.2, cross those out, then divide -12.55 to 3.2 which equals -3.921875~
