Respuesta :

mhanifa

Answer:

#1

The system of equations:

  • 2x + 7y = -11
  • 3x + 5y = -22

Solve by elimination.

Triple the first equation, double the second one, subtract the second from the first and solve for y:

  • 3(2x + 7y) - 2(3x + 5y) = 3(-11) - 2(-22)
  • 6x + 21y - 6x - 10y = -33 + 44
  • 11y = 11
  • y = 1

Find x:

  • 2x + 7*1 = -11
  • 2x = -11 - 7
  • 2x = -18
  • x = -9

The solution is:

  • x = -9, y = 1

#2

Simplifying in steps:

  • 8u - 29 > -3(3 - 4u)
  • 8u - 29 > - 9 + 12u
  • 12u - 8u < -29 + 9
  • 4u < -20
  • u < -5