Icanhopps2 Icanhopps2
  • 08-06-2017
  • Mathematics
contestada

Solve the system of equations 2r + 2s = 50 and 2r – s = 17.

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nafsaeatailii
nafsaeatailii nafsaeatailii
  • 08-06-2017
r = 14
s = 11

2(14)+2(11)=50
28+22=50

2(14) - 11 =17
28 - 11 =17
Answer Link
fussellk
fussellk fussellk
  • 08-06-2017
2r +2s = 50
2r - s = 17

Multiply the top by -1
-2r - 2s = -50
2r - s = 17
-3s = -33
s = 11

Then plug 11 in the first equation to get r
2r + 2(11) = 50
2r + 22 = 50
2r = 28
r = 14

so 11 and 14

Answer Link

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