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12-2u=9u+45 plssss help

User SinisterMJ
by
3.7k points

2 Answers

2 votes

Answer:

u = -3

Explanation:

12 - 2u = 9u + 45

12 - 2u + 2u = 9u + 2u + 45

12 = 11u + 45

12 - 45 = 11u + 45 - 45

-33 = 11u

-33/11 = u

-3 = u

Check:

12 - 2(-3) = 9(-3) + 45

12 + 6 = -27 + 45 = 18

User Casper Beyer
by
3.6k points
4 votes

Explanation:

12 - 2u = 9u + 45

-2u - 9u = 45 -12

-11u = 33 we'll cut 33 by 11 in 3 times

u = -3 answer

User Yossile
by
4.0k points