18 + 70 ie 87
It is: 7x+10y
-5y2+3x+2y
3x + 4y = 5x - 2y = 5leads to:x = 5 + 2ySo:3(5 + 2y) + 4y = 515 + 10y = 510y= -10y=-1and therefore if y = -1 then x = 3.
(4, 5)
18 + 70 ie 87
It is: 7x+10y
-5y2+3x+2y
-17 + y,,must be equals to..-17y..
It's a linear expression in two unknowns.It can be simplified a little bit:18x + 14y + 3x - 10y = 21x + 4y
It is: 3x+10y+5 simplified
3x + 4y = 5x - 2y = 5leads to:x = 5 + 2ySo:3(5 + 2y) + 4y = 515 + 10y = 510y= -10y=-1and therefore if y = -1 then x = 3.
(4, 5)
2x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
3x = 24, x = 8
If x = 8 and y = 10 then it is 44.
The value of x is -4