Question

0,7x-(0,9c-0,6y) Если 3y-x=9

Answer 1

Ответ:

(0,9с-0,6у)=

Пошаговое объяснение:

3у=3*у

у=0,6

0,6*3=1,8

0,7+1,8=2,5

ответ:

у=3у

(0,9с-1,8у=0,9)

0,9у-0,7х=0,2

Answer 2

To solve the expression 0.7x - (0.9c - 0.6y) when 3y - x = 9, we can substitute the value of x from the second equation into the first equation and solve for the remaining variables.

Given: 3y - x = 9

Rearranging the equation, we have: x = 3y - 9

Now substitute this value of x into the expression 0.7x - (0.9c - 0.6y):

0.7(3y - 9) - (0.9c - 0.6y)

Simplifying the expression:

2.1y - 6.3 - 0.9c + 0.6y

Combining like terms:

2.7y - 0.9c - 6.3

So the simplified expression is 2.7y - 0.9c - 6.3.