Реши уравнения? а + 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) а + 26 = 40 - 8;

a = 40 - 8 - 26;

a = 4;

2) b - 12 = 13 - 3;

b = 13 - 3 + 12;

b = 22;

3) 100 - 30 - c = 20;

-c = 20 - 100 + 30;

-c = - 50;

c = 50;

4) x + 20 + 15 = 90;

x = 90 - 20 - 15;

x = 55;

5) a + (34 + 26) = 100;

a + 60 = 100;

a = 100 - 60;

a = 40;

6) y + 20 = 80 - (40 + 5);

y + 20 = 45;

y = 45 - 20;

y = 25;