Question

Select all the equations that ware true when x is -4. (show your work)


A. -8 = 2x

B. -12 = x ⋅ -3

C. -12 = x +x + x

D. x/4 = -1

E. x+4 = 8

F. x^​2 = -16

G. 15x = 60

H. x = 60 ⋅ 50

I. x = 60/15

Answer 1

$\\ \rm\Rrightarrow -8=2(-4)=-8\checkmark$

$\\ \rm\Rrightarrow -12=-4-3\implies -12\neq -7$

$\\ \rm\Rrightarrow -12=-4-4-4\checkmark$

$\\ \rm\Rrightarrow \dfrac{-4}{4}=-1\checkmark$

$\\ \rm\Rrightarrow -4+4=0\neq 8$

$\\ \rm\Rrightarrow (-4)^2=16\neq -16$

$\\ \rm\Rrightarrow 15(-4)=-60\neq 60$

$\\ \rm\Rrightarrow -4=60.50\implies -4\neq 3000$

$\\ \rm\Rrightarrow -4\neq \dfrac{60}{15}$