Question

These two triangles are congruent by the hypotenuse leg theorem.

Answer 1

x-y=x+2
2x-y=4x+2y (same as we would write 2x+3y=0)

-y=2+x-x
y=-2

so 2x+3y=0 is
2x+3×(-2)=0
2x=6
x=6/2=3

x=3

answer: x=3