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6.4+7d/2.5=14.88
We simplify the equation to the form, which is simple to understand
6.4+7d/2.5=14.88
Simplifying:
6.4+2.8d=14.88
We move all terms containing d to the left and all other terms to the right.
+2.8d=+14.88-6.4
We simplify left and right side of the equation.
+2.8d=+8.48
We divide both sides of the equation by 2.8 to get d.
d=3.02857142857
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