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 = 5 2. у = 4 3. z = 7 4; 2x = 28 x = 14 5. 7y = 70 y = 10 6. 4x = 50 x = 12,5 7. 3x = 15 x = 5 8. 9x = 144 x = 16 9. 8z = 72 z = 9

12х=60 х=60/12 х=5 ============== 33у=132 у=132/33 у=4 =============== 51z=357 z=357/51 z=7 ================ 2х-15=13 2х=15+13 2х=28 х=28/2 х=14 ===================== 7у-25=45 7у=45+25 7у=70 у=70/7 у=10 ================= 130-4х=70 130-70=4х 60=4х х=60/4 х=15 ================ 49-3х=34 49-34=3х 15=3х х=15/3 х=5 ================= 9х-89=55 9х=55+89 9х=144 х=144/9 х=16 ===================== 74-8z=2 74-2=8z 72=8z z=72/8 z=9