(0,7)
9y + 10 = - 8 subtract 10 from both sides 9y = -18 Divide by 9 on both sides y = -2
9
9y-11=7 +11 +11 9y=18 y=2
5x(6x + 9y + 2)
2X + 6Y = 12 3X + 9Y = 18 try elimination - 3(2X + 6Y = 12) 2(3X + 9Y = 18) - 6X - 18Y = - 36 6X + 18Y = 36 ================= I will say this system is dependent and an infinite number of solutions can be found.
9y - 4x
(0,7)
x=9 y=1
6x + 3y + 6y - 2x = (6x - 2x) + (3y + 6y) = 4x + 9y
12y+3=9y-15 3y=-18 y=-6
(y + 6)(y + 3)
Y-8x plus 9y equals 10y-8x.
4y + 10 = -18 4y = -28 y = -7
1. 6x - 5y = 22 2. 5x - 9y = -1 1 times 5: 30x - 25y = 110 2 times 6: 30x - 54y = -6 Subtract : 29y = 116, so y = 4 and x therefore = 7
I x=5 and y=2, then (5x5)=25 plus (9x2)=18. 25+18=43
5x-4y+9y+x-9+7 = 5x + x - 4y + 9y - 9 + 7 = 6x + 5y - 2 ■