this here
We know that x-3 = 4x-15 so we can just factorize I think.
1.x-3 = 4x-15
2.x=4x-12
3.0=3x-12
4.12=3x
5.x=4
The answer is 4
🐺🐺🐺
The answer is 4 ONLY if quadrilateral EFGH is the parallelogram. (???)