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:
#2
Simplifying in steps:
- 8u - 29 > -3(3 - 4u)
- 8u - 29 > - 9 + 12u
- 12u - 8u < -29 + 9
- 4u < -20
- u < -5
