xy and yx are identical so you have 2xy = 545 ie xy = 272.5.
Possible answers 5 and 54.5, 10.9 and 25 etc
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xy + y = z xy = z - y (xy)/y = (z - y)/y x = (z - y)/y
It equals y+1
To find the value of the expression 4x - 2y + xy when x = -1 and y = 5, we first substitute the values of x and y into the expression. This gives us 4(-1) - 2(5) + (-1)(5). Simplifying this further, we get -4 - 10 - 5, which equals -19. Therefore, the value of the expression is -19 when x = -1 and y = 5.
97
4