5d-4=4-d
you have to bring the d to one side and the 4 to the other
remember there is a 1 in front of the d so you'll get
6d-4=4
then you get
6d=8
then you divide and get
d=4/3 or 1 and 1/3
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d = 2
14d + 20e
It is a linear equation in one unknown, d.
1.6-d=12.8+3d 12.8-1.6=-d-3d 11.2=-4d 11.2/-4=d d=-2.8
4(9)-11=25 2(9)+7=25 d=9