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solve for d. 18d + 3d + 5d - 21d = 15 d = submit

Question

solve for d.
18d + 3d + 5d - 21d = 15
d =
submit

Explanation:

Step1: Combine like terms

$18d + 3d + 5d - 21d = (18+3+5-21)d = 5d$

Step2: Isolate the variable d

$5d = 15 \\
d = \frac{15}{5}$

Answer:

$d = 3$