4x+8y=-24
f(x) = 2x2 + 4x - 7
2
4x-14
The answer to the problem of 13 equals -4x plus 9 is x equals -1.
6x-52 = 4x+40 6x-4x = 40+52 2x = 92 Answer: x = 46
4x+8y=-24
4x + 10 + 3x = 40 - 3x 4x + 10 + 3x + 3x = 40 20x = 40 x = 2
x + 3x = 40 4x = 40 x = 10.
a) 4x+13y=40 b) 4x+3y=-40c) multiply b per(-1)=-4x-3y-40d) sum a and c: 4x+13y-4x-3y=40-(-40)=>10y=80 => y=8to find x replace y per its value in a or b and get x=-16
f(x) = 2x2 + 4x - 7
2
4x-14
Try elimination.4X + 13Y = 40- 1(4X + 3Y = - 40)4X + 13Y = 40- 4X - 3Y = 40-----------------------add10Y = 80Y = 8-------------find X ( top equation )4X + 13(8) = 404X + 104 = 404X = - 64X = - 16----------------------check in both equations for consistency4(- 16) + 13(8) = 40- 64 + 104 = 4040 = 40-------------top checks4(- 16) + 3(8) = - 40- 64 + 24 = - 40- 40 = - 40-------------------both check and are consistentSo, X is,- 16 ( while Y is 8 )
The answer to the problem of 13 equals -4x plus 9 is x equals -1.
4x plus 7 plus 3x equals 19 plus xx = 2
(9,3)