princess5964
26.11.2019 •
Mathematics
What is the solution to this equation?
whal
x-12 = 9
c
o a. x= 21
o b. x=-21
o c. x=-3
o d. x= 3
Solved
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Ответ:
x-12 = 9
move -12 to the other side
sign changes from -12 to +12
x-12+12= 9+12
x=9+12
x= 21
A. x= 21
Ответ: