Question 1159333: If 9x - 11 = 12, what is the value of 9x + 7?
Can you help me with solving this?
Found 3 solutions by josgarithmetic, jim_thompson5910, ikleyn:
Answer by josgarithmetic(39617)   (Show Source):
Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website!
We could solve 9x-11 = 12 for x, and then plug it into 9x+7 to get the answer. However, solving for x leads to a fraction which isn't ideal.
Instead of isolating x itself, lets isolate 9x
We do this by adding 11 to both sides
9x-11 = 12
9x-11+11 = 12+11
9x = 23
Since we know 9x is equal to 23, we can then add 7 to both sides to find the value of 9x+7
9x = 23
9x+7 = 23+7
9x+7 = 30
Answer by ikleyn(52782)  (Show Source):
You can put this solution on YOUR website! .
It is a joke math problem, for children of the 5-th - 6-th grade, which sometimes
a teacher gives them to "warm up" or to "wake up" their brains. // (Instead of saying "good morning . . . ").
The first rule is "do not solve an equation".
The second rule is "simply add 18 to both sides".
Again, this problem's intention it is to worm children's (and aged people's) brain.
An entertainment kind problem . . .
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