Ayuda con estas ecuaciones pueden ser con el metodo de igualacion, de sustitución, o ee suma y resta mientras este bien no hay problem?

<img src="https://tex.z-dn.net/?f=%5Ctextup%7BEl%20sistema%20es%7D%5C%5C%20%5Cleft%5Clbrace%5Cbegin%7Barray%7D%7Brcl%7D%202x-3y%26%3D%268%5C%5C3x-2y%26%3D%2625%5Cend%7Barray%7D%5Cright.%5C%5C%5Ctextup%7Bluego%20multiplicando%20la%20ecuaci%5C%27on%201%20por%20-3%2F2%20se%20tiene%3A%7D%5C%5C%20%5Cleft%5Clbrace%5Cbegin%7Barray%7D%7Brcl%7D%20-3x%2B%5Cfrac%7B9%7D%7B2%7Dy%26%3D%26-12%5C%5C3x-2y%26%3D%2625%5Cend%7Barray%7D%5Cright.%5C%5C%5Ctextup%7Bsumando%20las%20ecuaciones%201%20y%202%20obtenemos%3A%7D%5C%5C%5Cfrac%7B5%7D%7B2%7Dy%3D13%5C%5Cy%3D%5Cfrac%7B13%7D%7B%5Cfrac%7B5%7D%7B2%7D%7D%3D%2813%29%28%5Cfrac%7B2%7D%7B5%7D%29%3D%5Cfrac%7B26%7D%7B5%7D%5C%5C%5Ctextup%7BSustituyendo%20el%20valor%20de%20y%20en.1%20se%20obtiene%3A%7D%5C%5C2x-3%28%5Cfrac%7B26%7D%7B5%7D%29%3D8%5C%5C2x-%5Cfrac%7B78%7D%7B5%7D%3D8%5C%5C2x%3D8%2B%5Cfrac%7B78%7D%7B5%7D%5C%5C2x%3D%5Cfrac%7B118%7D%7B5%7D%5C%5Cx%3D%28%5Cfrac%7B118%7D%7B5%7D%29%28%5Cfrac%7B1%7D%7B2%7D%29%3D%5Cfrac%7B59%7D%7B5%7D%5C%2C%5Ctextup%7Bas%5C%27i%20las%20%20soluciones%20del%20sistema%20son%3A%7D%5C%5Cx%3D%5Cfrac%7B59%7D%7B5%7D%5C%5Cy%3D%5Cfrac%7B26%7D%7B5%7D%5C%5C%5Ctextup%7BComprobando%3A%7D%5C%5C%202%28%5Cfrac%7B59%7D%7B5%7D%29-3%28%5Cfrac%7B26%7D%7B5%7D%29%3D8%5C%5C8%3D8%5C%5C3%28%5Cfrac%7B59%7D%7B5%7D%29-2%28%5Cfrac%7B26%7D%7B5%7D%29%3D25%5C%5C%5Cfrac%7B177%7D%7B5%7D-%5Cfrac%7B52%7D%7B5%7D%3D25%5C%5C25%3D25" />

Saludos.