(48 + 32) : 20 + 100 : 20 x 8 - 22 = 22
1) 48 + 32 = 80
2) 80 : 20 = 4
3) 100 : 20 = 5
4) 5 x 8 = 40
5) 4 + 40 = 44
6) 44 - 22 = 22
А)5y+8y +9 =100 г)x+x+1+x+2=9
5y+8y=100-9 3x=9-1-2
13y=91 3x=6
y=7 x=2
б)x-50+x=3 д)z-2+z-1+z=-3
x+x=3+50 3z=-3+3
2x=53 3z=0
x=26.5 z=0
в)18-3x-4-2x=-6 е)21+20-4x-11+2x=0
-3x-2x=-6-18+4 -4x+2x=11-21-20
-5x=-20 2x=-30
x=4 x=-15