10.152
1)1/5*a+3/5*a+2/7-2/5*a. 2)1/36+7/9*m-2/18*m+3/16
(1/5+3/5+2/7-2/5)*a. ( 1/36+7/9+2/18+3/16)*m
10.153
1)x+3/8=1/2 2)x-1/4=3/7 3)прости ,но не могу 4)1/2*x+1/3*x=5/6
x=1/2-3/8 x=3/7+1/4 ( 1/2*1/3)*x=5/6
x=1/8 x=19/28 3/6*x=5/6
x=5/6:3/6. x=?
5? 6?