Question

c) 5 – z = 4(z-3)

d) 0,6 – 1,6(t– 4) = 3(7 – 0,4t)

e) 2 (x – 2) - (x – 7) = 5

Answer 1

Ответ:

5-z=4(z-3)

5-z=4z-12

-z-4z= -12-5

-5z= -17

z= -17÷(-5)

z=3,4

0,6-1,6(t-4)=3(7-0,4t)

0,6-1,6t+6,4=21-1,2t

7-1,6t=21-1,2t

-1,6t+1,2t=21-7

-0,4t=14

t=14÷(-0,4)

t= -35

2(x-2)-(x-7)=5

2x-4-x+7=5

x+3=5

x=5-3

x=2