Question

solve system of equations using substitution 2x-3y=7, y=3x-7​

Answer 1

Answer:

y= 3x-7 man put karna hoga

2x-9x+21=7

-7x=-14

x=2

Answer 2

Step-by-step explanation:

ANSWER:-

Given Equations:-

• 2x-3y=7
• y = 3x -7

How to Solve:-

• First we will SOLVE any one of the equations
• then find any one value let us say of x or y
• Then find value
• And then find the second value.

In this, we are already given the value of y.

Placing directly we get,

2x -3(3x-7)=7

2x -9x + 21 = 7

- 7x = - 14

x = 2.

Now, y

y = 3×2-7

y = -1 is the answer.

Things to Note:-

• Always in substitution find the value of one with respect to the other
• Applicable only in two variable question
• Remember to find the second value
• This can be brought out only by placing the value of first one.