Answer: x = 10
7x + 5 is equal to 9x - 15 because they have and share similar angles and verticies.
7x + 5 = 9x - 15
subtract 7x and and 15 to both sides. This leaves us with.
20 = 2x
Divide both sides by 2 to get x alone.
10 = x
Plug x back into original equation to check work.
7 (10) + 5 = 9 (10) - 15
70 + 5 = 90 - 15
75 = 75
