1) 12х=60; 2) 33у=132; 3) 51z=357; 4) 2x-15=13; 5) 7y-25=45; 6) 130-4x=70; 7)49-3x=34;8) 9x-89=55; 9) 74-8z=2;

1. Х = 52. у = 43. z = 74; 2x = 28x = 145. 7y = 70y = 106. 4x = 50x = 12,57. 3x = 15x = 58. 9x = 144x = 169. 8z = 72z = 9

12х=60х=60/12х=5==============33у=132у=132/33у=4===============51z=357z=357/51z=7================2х-15=132х=15+132х=28х=28/2х=14=====================7у-25=457у=45+257у=70у=70/7у=10=================130-4х=70130-70=4х60=4хх=60/4х=15================49-3х=3449-34=3х15=3хх=15/3х=5=================9х-89=559х=55+899х=144х=144/9х=16=====================74-8z=274-2=8z72=8zz=72/8z=9