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gogolik [260]
3 years ago
13

What do x equal-2(x+5)=4

Mathematics
2 answers:
Kitty [74]3 years ago
8 0

Answer:x=-7

Because -2 times x makes it -2x and times 5 makes it 10 so it would be -2x-10. you add 10 to get rid of the it and add ten to the 4 now it’s -2x=14 now you divide by -2 and it’ll equal x=-7

valkas [14]3 years ago
3 0
X=-7 because of the distribution property. Once you do that you can solve as normal
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1 year ago
  1) 5x-2y=4.         2) 3x-5y=13  x-2y=5<br>3x+y=9
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\left\{\begin{array}{ccc}5x-2y=4\\3x+y=9&/\cdot2\end{array}\right\\+\left\{\begin{array}{ccc}5x-2y=4\\6x+2y=18\end{array}\right\\----------\\.\ \ \ \ \ 11x=22\ \ \ \ /:11\\.\ \ \ \ \ \ \ x=2\\\\3\cdot2+y=9\\6+y=9\\y=9-6\\y=3\\\\Answer:x=2;\ y=3


\left\{\begin{array}{ccc}3x-5y=13\\x-2y=5\end{array}\right\\\left\{\begin{array}{ccc}3x-5y=13\\x=2y+5\end{array}\right\\\\substitute:\\\\3(2y+5)-5y=13\\6y+15-5y=13\\y=13-15\\y=-2\\\\x=2\cdot(-2)+5=-4+5=1\\\\Answer:x=1;\ y=-2.
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