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

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

Step-by-step 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.

step-by-step explanation:

compare

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540