Ответ:
1. x-(23+17)=60
x-40=60
x=60+40
x=100
2. (30-15)+y=80
15+y=80
y=80-15
y=65
3. x+12=50+(15+5)
x+12=50+20
x+12=70
x=70-12
x=58
1) х-40=60
х=60+40
х=100
2)15+у=80
у=80-15
у=65
3)х+12=50+20
х=50+20-12
х=58
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Ответ:
1. x-(23+17)=60
x-40=60
x=60+40
x=100
2. (30-15)+y=80
15+y=80
y=80-15
y=65
3. x+12=50+(15+5)
x+12=50+20
x+12=70
x=70-12
x=58
Ответ:
1) х-40=60
х=60+40
х=100
2)15+у=80
у=80-15
у=65
3)х+12=50+20
х=50+20-12
х=58