sharperenae463
02.07.2020 •
Mathematics
If 10 + 5x is 12 more 8, what is the value of 3x?
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Ответ:
3x=6
Step-by-step explanation:
10 + 5x =8+12
10 +5x = 20
Subtract 10 from each side
10-10+5x=20-10
5x= 10
Divide by 5
5x/5 = 10/5
x = 2
We want 3x
3(2) = 6
3x=6
Ответ:
3x + 9 = 3(x + 3)