Решить уравнения a+26=40-8; b-12=13-3; 100-30-c=20; x+20+15=90; a+(34+26)=100; y+20=80-(40+5).
1-4 класс
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a+26=40-8;
a+26=32
a=32-26
a=6
Ответ: a=6.
b-12=13-3;
b-12=10
b=10+12
b=22
Ответ: b=22.
100-30-c=20;
(100-30)-c=20
70-c=20
c=70-20
c=50
Ответ: c=50.
x+20+15=90;
x+20=90-15
x+20=75
x=75-20
x=55
Ответ: x=55.
a+(34+26)=100;
a+60=100
a=100-60
a=40
Ответ: a=40.
y+20=80-(40+5)
y+20=80-45
y+20=35
y=35-20
y=15
Ответ: y=15.
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А=40-8-26
А=6;
B=13-3+12
B=22;
C=20-100+30
C=-50;
X=90-20-15
X=55;
A=100-34-26
A=40
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2)Реши уравнения,используя первое свойство равенств.
16х+5=133 42R-28R+180=600
3)Реши уравнения,используя второе свойство равенств.
8у*5=56*5 146a-97=(9+26)*7
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Реши уравнения используя второе свойство равенств:
8у*5=56*5 146а-97=(9+26)*7
Вспомни, как можно найти неизвестное слагаемое, вычитаемое и реши уравнения.
38+x=50,x-17=20,40-x=19
Срочно!!!!!!!!!!!
Решите уравнение: а + 45=129