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That completely depends on the value of 'd'. And whenever 'd' changes,
the answer immediately changes too.
If -6d = 42 then 6d = -42. then divide by 6, d = -7
9d-19=6d+2 ... add 19 to both sides and subtract 6d from both sides... 9d-6d=2+19 3d=21 d=21/3 d=7
9d+3
2(3d+7)=5+5d. 6d+14=5+5d 6d+9=5d 9=-1d d=-9 I think that's correct. If it is, ur welcome.
72-6d=6 subtract 72 from both sides -6d=66 divide by -6 d=-11