Question

У = х +7,5 Найдите х ,если у=1, у=-1, у= , у=5

Answer 1

$y=-\frac{3}{8}x+7,5;\\\frac{3}{8}x=7,5-y;\\x=20-\frac{8}{3}y;\\y=1;\ x=20-\frac{8}{3}=17\frac{1}{3};\\y=-1;\ x=20+\frac{8}{3}=22\frac{2}{3};\\y=-\frac{2}{3};\ x=20-\frac{8}{3}(-\frac{2}{3})=18\frac{2}{9};\\y=5;\ x=20-\frac{8}{3}*5=6\frac{2}{3};$

Answer 2

To find the value of x in the equation Y = x + 7.5, we can substitute the given values of Y and solve for x.

1. When Y = 1: 1 = x + 7.5 Subtract 7.5 from both sides: x = 1 - 7.5 x = -6.5

2. When Y = -1: -1 = x + 7.5 Subtract 7.5 from both sides: x = -1 - 7.5 x = -8.5

3. When Y = (the value of Y is not given, so we cannot find x without this information).

4. When Y = 5: 5 = x + 7.5 Subtract 7.5 from both sides: x = 5 - 7.5 x = -2.5

So, the values of x for the given Y are: x = -6.5, x = -8.5, and x = -2.5.

However, the third value of Y is missing, so we cannot determine the corresponding value of x without that information.