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2x + y - 3z

IamODIN
By IamODIN
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-i know i know. this is mega off topic but sumtimes we are in need of help-

 

 

im suppose to solve this

 

the answer is this: -14 (minus 14)

 

what i want to know is how did they get minus 14? what did they do?

 

The question is:

0xGAVbW.png

 

 

what did they do to get the answer as -14?

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Posted

2 x 2 +(-3) - (3 x 5) = 4 - 3 - 15 = -14

 

Which part is unclear to you?

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Posted

x is 2 so 2x is 4 -> clear, I presume

 

y is -3

 

Adding a negative number is the same as subtracting positive. So adding a -3 is the same as subtracting 3.

CPU: i7 6950X  |  Motherboard: Asus Rampage V ed. 10  |  RAM: 32 GB Corsair Dominator Platinum Special Edition 3200 MHz (CL14)  |  GPUs: 2x Asus GTX 1080ti SLI 

Storage: Samsung 960 EVO 1 TB M.2 NVME  |  PSU: In Win SIV 1065W 

Cooling: Custom LC 2 x 360mm EK Radiators | EK D5 Pump | EK 250 Reservoir | EK RVE10 Monoblock | EK GPU Blocks & Backplates | Alphacool Fittings & Connectors | Alphacool Glass Tubing

Case: In Win Tou 2.0  |  Display: Alienware AW3418DW  |  Sound: Woo Audio WA8 Eclipse + Focal Utopia Headphones

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Posted
  • Author
4 minutes ago, Lathlaer said:

x is 2 so 2x is 4 -> clear, I presume

 

y is -3

 

Adding a negative number is the same as subtracting positive. So adding a -3 is the same as subtracting 3.

i kinda get it now. what i did is

 

x2 = 4

 

4 + -3 = 1

 

1 + -15 = -14 lol

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