Question

Eu to muitoenduvida disso podem me explica?
-2×-4=6​

Answer 1

$\boxed{\begin{array}{lr} \boxed{\begin{array}{lr} -2x-4=6 \end{array}}\\\boxed{\begin{array}{lr} -2x=6+4 \end{array}}\\\boxed{\begin{array}{lr} -2x=10 \end{array}}\\\boxed{\begin{array}{lr} 2x=-10 \end{array}}\\\boxed{\begin{array}{lr} x=\frac{-10}{2} \end{array}}\\\boxed{\begin{array}{lr} x=-5 \ \ \ \ \checkmark \end{array}} \end{array}}$