Answer:
Explanation:
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[tex]a = \frac{v _f- 12}{5} [/tex]
Multiply both sides by 5:
[tex]5a = v_f - 12[/tex]
+12 on both sides:
[tex] 5a+ 12 = v_f[/tex]
[tex]v_f = 5a + 12[/tex]
Thus, the value of x is 5.
