Answer:
mjhhhýyyyyyydsssssssssss
You said never mind, but I really like your username :)
Step-by-step explanation:
x * x = x^2
x * .7 = .7x
-6 * x = -6x
-6 * .7 = -4.2
x^2 + .7x - 6x -4.2
x^2 - 5.3 - 4.2
x = 6