Question

Раскройте все скобки и приведите подобные члены.
a) 2 (7 − a) =
b) 5х + 3 + 2 (7 − x) =
c) 7 − 3 (2 + c) =
d) 21y − (3 + y) 17 =
e) 2х + 25 + 3 (х − 7) =
f) [(15 − 4х) 2 − 9] 2 − 40 =
g) 3[25 − х − 3 (1 − y)] − 6 =
h) {2[5t + 2 (15 − 3c] − k)} 7 + 3 =
i) (2х − [4 − y]) 5 − z =
j) 3 − {2 [11 − 2 (5 − 3c)] − 5t} =

Answer 1

2(7-a)=14-2a

5x+3+2(7-x)=5x+3+14-2x=3x+17

7-3(2+c)=7-6-3c=1-3c

21y-(3+y)17=21y-51-17y=4y-51

2x+25+3(x-7)=2x+25+3x-21=5x+4

((15-4x)2-9)2-40=(30-8x-9)2-20=(21-8x)2-20=42-16x-20=22-16x

3(25-x-3(1-y))-6=3(25-x-3+3y)-6= 75-3x-9+9y-9=75-3x+9y

(2(5t+2(15-3c)-k)7+3= (2(5t+30-6c-k)7+3=(10y+60-12c-2k)7+3=70k+140-84c-14k+3=56k+143-84c

(2x-(4-y))5-z=(2x-4+y)5-z=10x-20+5y-z=9z-20+5y

3-(2(11-2(5-3c))-5t)=3-(2(11-10+6c)-5t)=3-(2(1+6c)-5t)=3-(2+12c-5t)=3-2-12c+5t=1-12c+5t