55-с=52 Х-30=7 У+9=16 48-у=40 d+10=60 d+20=80

Question

55-с=52 Х-30=7 У+9=16 48-у=40 d+10=60 d+20=80

Answer 1

55-с=52
-с=52-55
-с=-3
с=3

х-30=7
х=30+7
х=37

у+9=16
у=16-9
у=7

48-у=40
-у=40-48
у=8

d+10=60
d=60-10
d=50

d+20=80
d=80-20
d=60