9х - 26 = 30 - 5х
9х + 5х = 30 +26
14х = 56
х= 56/14
х= 4
9*4 - 26 = 30 - 5*4
36 -26 = 30-20
10=10
7-3х = 6х -56
-3х -6х = -56 - 7
-9х = -63
х= (-63)/(-9)
х=7
7 - 3*7 = 6*7 - 56
7-21 = 42 -56
-14= -14
5(х-4) = х+8
5х -20 = х+8
5х-х=8+20
4х=28
х=28/4
х=7
5(7-4) = 7+8
5*3 = 15
15=15