Question

z = 4x - 5y ÷ 5x - 4y, then express x in terms of y and z​

Answer 1

Answer:

Step-by-step explanation:4x+5y=4

Subtract 5y from both sides.

4x=4−5y

Divide both sides by 4.

4

4x

​

=

4

4−5y

​

Dividing by 4 undoes the multiplication by 4.

x=

4

4−5y4x+5y=4

Subtract 4x from both sides.

5y=4−4x

Divide both sides by 5.

5

5y

​

=

5

4−4x

​

Dividing by 5 undoes the multiplication by 5.

y=

5

4−4x

​

​

Divide 4−5y by 4.

x=−

4

5y

​

+1