2x+y = 10 x +y = 4 Subtract bottom equation from top equation: x = 6 Substitute the value of x into the equations to find the value of y: x = 6 and y = -2
Two solutions:x = 5 and y = 6, orx = 6 and y = 5.
2x + y = 25 x + y = 14 Subtract second equation from the first: x = 11 Substitute this value of x in the second equation: 11 + y = 14 ie y = 3
x + y + z = 0 x = a - b, y = b - c, z = c - a, therefore a - b + b - c + c - a = ? a - a + b - b + c - c = 0
The answer is 5x+3y. (5 xs and 3 ys)
y += x means the value y+x is first calculated, and the resulting value is then assigned to y. It is equivalent to y = y+x
x = 14
(1/x) + (1/y) + (1/z) is a minimum value when x=y=z=10. Symmetry gives either maximum or minimum value.
y - 1
If: y = x+b then y-x = b
That depends on the value of x and y. As an expression, "x + y" can't be simplified.
It depends on the value of 'x'. 'y' can have as many different values as 'x' can.
x + 2 = y x - y + y - x = 0, even though what is y equivalent. Are you sure, you are looking for something else?
x + y = 17 + 23 = 40
y = 6
y=2.5 and x=5
15 (x = 135)