If A is a variable that you are solving for and the problem is A + 5 = 23 then you subtract 5 from both sides to solve for A...
A + 5 - 5 = 23 - 5
Simplify...
A = 18
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Oh, dude, if 5 plus n equals 23, then n must be 18, right? So, if you wanna find out what n minus 5 equals, just subtract 5 from 18 and you get 13. Easy peasy lemon squeezy.
8 plus 15 = 23
23 + 5u = 17Subtract 17 23 from both sides:5u = -6Divide both sides by 5:u = -6/5
No. It equals 15.
It is: 157+23 = 180