Y= 4x - 6 2x - 3y = 8 if this problem is to be solved by substitution, which is a correct step? a.2x - 12x + 18 = 8 b.2x - 12x - 18 = 8 c.2x - 4x + 6 = 8 d.2x + 12x + 18 = 8

The correct step is a.

Step-by-step explanation:

Given the following linear equation system :

One way to solve it is by substitution.

By substitution, we need to have one of the variables in term of the another.

In this exercise, we have the variable ''y'' in terms of ''x'' in the first equation :

Given that we know this, we can replace the value of ''y'' in the second equation :

Replacing  ⇒

That it is the correct step in order to use substitution.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

ddd

step-by-step explanation: