Respuesta :

sadstudent234
Plug in 3x-5 to the second equation for every y value. (This is substitution)
2x +6(3x-5)=20
2x+18x-30=20
20x=50
x=2.5

Then solve the first equation with your x value

y=3(2.5)-5
y=7.5-5
Y=2.5

To check plug the numbers into both
EQ 1: 2.5=7.5-5
EQ 2: 5+15=20

The most efficient first step to solve this set of equations substitute the y value in equation 2x+6y=20.

Equation

Equation is described as the state of being equal, and it is commonly represented as a math expression with equal values on both sides, or it refers to a problem involving numerous variables.

How to solve this set of equations?

The give set of equatuion is

y=3x-5 ...(1)

2x+6y=20   ...(2)

Substitute the y value in equation 2 from equation (1)

2x+6(3x-5)=20

2x+18x-30=20

         20x=20+30

          20x=50

              x=2/5

Hence the substitute they is the most efficient first step to solve.

Learn more about equation here: https://brainly.com/question/1884491

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