briannaleppert
briannaleppert briannaleppert
  • 13-10-2017
  • Mathematics
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what is the solution of the following system 4x-y=15 3x+2y=-8

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kishorrock1315ow60os
kishorrock1315ow60os kishorrock1315ow60os
  • 13-10-2017
from the first equation we get 

y=4x-15

put the value of y in the second equation

3x+2(4x-15)= -8
3x+8x-30= -8
11x=22
x=2

now put x=2 in any one eqn , say in first

4(2)-y=15
8-y=15
-y=7
y=-7
 
hope you understand!
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