The absolute value of any number is the "distance from zero". If the expression is negative, it is converted to positive. The absolute value of x+7 can be either x+7 (if x+7 is positive) or -(x+7) (if x+7 is negative).
75 = 7 x 7 x 7 x 7 x 7 = 16807
It is: x+4+2x-7 = 3x-3 simplified
If you mean: 7x = 49 then the value of x is 7
if 2x + y = 7, what is the value of y when x = 3?
x/35 = 7 x = 7 * 35 x = 245
If you mean: 6 = x-1 then the value of x is 7
If you mean: 2(x-7) =18 then the value of x works out as 16
36
The value of x is 7
y2 + x = 7 : this can be written as y2 = 7 - x or x = 7 - y2. There is not a specific solution to this identity. For each different value assigned to x then a different value is generated for y. Or, it can be viewed that for each different value assigned to y then a different value is generated for x. This expression is therefore a function.
You are basically looking for an equation with an x and y value where when 4 is set as x, y would equal 7. An equation of this is: 3 + x = y when x = 4, then y = 3 + 4 = 7