Question

Please help on this equation: 26u+4(12u-5)=128. Thank You

Answer 1

Perform the multiplication first, following Order of Operations Rules:

26u+4(12u-5)=128  =>  26u + 48u - 20 = 128
Then 74u = 148, so u = 2.  This is the "solution," the value of u that makes 26u+4(12u-5)=128 true.

Answer 2

First you need to distribute the 4 into 12u-5.  4 is multiplying.  So your equations becomes:
26u+48u-20=128
Then add the u's together, so you have:
74u-20=128
Then add 20 to both sides.  This cancels the 20 out on the left side, leaving:
74u=128+20 which simplifies to 74u=148
Then divide both sides by 74.  This cancels out the 74 on the left side, leaving:
u=148/74   Simplify to: u=2