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erik [133]
3 years ago
11

X6=729.help find out whats the x

Mathematics
2 answers:
Vika [28.1K]3 years ago
8 0

Answer:

x6=729

Step-by-step explanation:

the answer is 121.5

tamaranim1 [39]3 years ago
6 0

Answer:

x = 121.5

Step-by-step explanation:

  1. Write it out: 6x = 729
  2. Divide each side by 6 to cancel out the 6 next to x. It should now look like this: x = 121.5
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Step-by-step explanation:

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\underline{+\left\{\begin{array}{ccc}-9x-3y=-15\\-x+3y=15\end{array}\right}\qquad\text{add all sides of the equations}\\.\qquad-10x=0\qquad\text{divide both sides by (-10)}\\.\qquad\boxed{x=0}\\\\\text{Put it to the second equation:}\\-0+3y=15\\3y=15\qquad\text{divide both sides by 3}\\\boxed{y=5}\\\\\text{Put the value of}\ x\ \text{to}\ (*):\\\\z=3-2(0)\\\boxed{z=3}

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