19 + y
x = 2y = 4
y = 6
The values are: x = -6 and y = 10
Well lets see: 2y = 6x+8 y=3x+4 does not equal y=3x+6 So they are not the same.
19 + y
x = 2y = 4
y = 6
If x=6 and y=8, then [ 5x + 8y ] = 5(6) + 8(8) = 30 + 64 = 94
-6
The values are: x = -6 and y = 10
Well lets see: 2y = 6x+8 y=3x+4 does not equal y=3x+6 So they are not the same.
y=2x+8 x+y=-1 From the second you get x = -1-y, put in the first y=2*(-1-y)+8 then y = -2 y +6 3y = 6 => y = 2 and x = -3
10*6+8*7 = 116
16
16. Because if y=8 then the question becomes 8+8. Which equals 16.
x + y = 6 2x + y = 8 Subtract the top equation from the bottom one: 2x - x + y - y = 8 - 6 x = 2 Going to the top equation, substituting 2 for x: 2 + y = 6 Which you should be able to solve if you are asking this question.