Question

How do i solve this problem?

Answer 1

3.5

Explanation:

Triangles always equal to 180

42 + 78 + 16x + 4 = 180

124 + 16x = 180

56 = 16x

3.5 = x

Answer 2

You can use a^2+b^2=c^2;

Explanation:

42^2+78^2=(6x-1+10x+5)^2