сделайте 482 мальчишка и девченка

1) 5y - 72 = 48 - 3y
   5y + 3y = 48 + 72
   8y = 120
   y = 120 : 8 =  15
2) 53(x - 961) = 3975
     x - 961 = 3975 : 53
     x - 961 = 75
     x = 75 + 961 = 1036
3) (k + 2958) : 87 = 134
     k + 2958 = 134 * 87
     k + 2958 = 11 658
     k = 11 658 - 2 958 = 8 700
4) 69 + 4m = 2m + 153
     4m - 2m = 153 - 69
     2m = 84
     m = 84 : 2 = 42

5у-72=48-3у
5у+3у=48+72
8у=120
у=120/8
у=15

53*(х-961)=3975
53х-50933=3975
53х=3975+50933
53х=54908
х=54908/53
х=1036

(k+2958)/87=134
k/87+34=134
k/87=134-34
k/87=100
k=100*87
k=8700

69+4m=2m+153
4m-2m=153-69
2m=84
m=84/2
m=42