(х-6)²=(7-х)²
х²-12х+36=49-14х+х²
х²-х²-12х+14х+36-49=0
2х=49-36
2х=13
х=6,5
х²-12х+36-49+14х-х²=0
2х-13=0
(х-6)²=(7-х)²
х²-12х+36=49-14х+х²
х²-х²-12х+14х+36-49=0
2х=49-36
2х=13
х=6,5
х²-12х+36=49-14х+х²
х²-12х+36-49+14х-х²=0
2х-13=0
х=6,5