When she subtracts 4 from both sides, 1/2x=-1.2x result. What is the value of x

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?