Question

Which choice is the most efficient first step to solve this set of equations?

Answer 1

Option b) is correct

3x+4(2x+4)=17 Substitute (2x+4) for y in the second equation

Explanation:

Given Equations are

`y=2x+4\hfill (1)` and
`3x+4y=17\hfill (2)`

To solve the given equations we have to find the value of

x and y values.

Here y value is given so that we can substitute y=3x+4 value in second equation

ie., Substitute equation (1) in (2) equation we can easily get x value.

Therefore substitute (2x+4) for y in the second equation we get

3x+4(2x+4)=17

Option b) is correct