Question

5x + 10y = 18

x = y - 6
Which of the following equations is the result of substituting y - 6 in for x in the first equation?

a)5x + 10y - 6 = 18
b)5y - 6 + 10y = 18
c)5y - 30 + 10y = 18

Answer 1

option (c) (5y - 30 + 10y = 18)

Explanation:

The given equation are 5x + 10y = 18 ------(1)

and x = y - 6 ------------------(2)

Now we have to find the equation which is the result of substituting ( y-6 ) in for x in the first equation.

By substitution in equation (1)

5 ( y-6 ) + 10y = 18

5y - 30 + 10y = 18

Therefore, option (c) (5y - 30 + 10y = 18) is the answer.

Answer 2

I believe the correct answer from the choices listed above is option C. The result of substituting y - 6 in for x in the first equation would be 5y - 30 + 10y = 18. This is done as follows:

5x + 10y = 18
5(y - 6) + 10y = 18
5y -30 +10y = 18


Hope this answers the question. Have a nice day.