rosehayden21
27.06.2019 •
Mathematics
What number is the substitution of 4(3x+9) and 5x+8
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Ответ:
-4
Step-by-step explanation:
If the question is for which x the equations 4(3x+9) and 5x+8 produce the same answer, the answer is x=-4
4(3x+9) = 5x+8
12x + 36 - 5x - 8 =0
7x = -28
x = -4
Ответ:
a. 30 b. 50 c. I have no clue