Answer:
-5
Explanation:
3u+4=6u+19
-3u -3u
4=3u+19
-19 -19
-15=3u
÷3 ÷3
-5=u or u=-5
u=-5
Put all like terms on one side:
3u-6u=19-4
Simplify:
-3u=15
~Stay golden~ :)
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