If `x^2-7x=-12` , what is the value of `x` ?

If 4x+7=12, what is the value of 8x+3 ?

If x is a positive integers and x+12=x^(2) , what is the value of x?

If 4x-2y=10 and 7x+2y=23 ,what is the value of x?

If f (x ) = 2x ^(2) + 7x -3, what is the value of g (-2) ?

If x ^(2) -7x =30 and x gt0, what is the value of x -5 ?

If 2x=3+5i, then what is the value of 2x^(3)+2x^(2)-7x+72 ?

If (7)/(12)x-(1)/(3)x=(1)/(2)+(3)/(8) , what is the value of x?

IF f(x) = tan x+e^(-2x)-7x^(3) , then what is the value of f'(0)?

A function h is defined as follows : for x gt 0, h(x)=x^(7)+2x^(5)-12x^(3)+15x-2 for x le0, h(x)=x^(6)-3x^(4)+2x^(2)-7x-5 What is the value of h(-1) ?