Solve x - y = 1 , 5x - 3y = 1 by elimination method
Answers
Answer:
x - y = 1......(1)
5x - 3y = 1 ......(2)
Multiplying equation (1) by 5,we get:
5(x - y = 1)
= 5x - 5y = 5.....(3)
By elemination method,
5x - 3y = 1 .....(2)
5x - 5y = 5.....(3)
- + -
2y = 4
y = 4/2
y = 2
Putting value of y in eg (2),we get
5x - 3y = 1
5x - 3*2 = 1
5x - 6 = 1
5x = 1+6
5x = 7
x = 7/5
x = 1.4
Ans: 1) x = 1.4
2) y = 2
Hope this helps
Answer:
The solution of the given simultaneous equations is ( x, y ) = ( - 1, - 2 ).
Step-by-step-explanation:
The given simultaneous equations are x - y = 1 and 5x - 3y = 1.
x - y = 1 - - ( 1 )
5x - 3y = 1 - - ( 2 )
By multiplying equation ( 1 ) by 3, we get,
3x - 3y = 3 - - ( 3 )
By subtracting equation ( 2 ) from equation ( 3 ), we get,
3x - 3y = 3 - - ( 3 )
-
5x - 3y = 1 - - ( 2 )
(-)..... (+)...... (-)
____________
⇒ - 2x = 2
⇒ x = - 2 / 2
⇒ x = - 1
By substituting x = - 1 in equation ( 1 ), we get,
x - y = 1 - - ( 1 )
⇒ - 1 - y = 1
⇒ - y = 1 + 1
⇒ - y = 2
⇒ y = - 2
∴ The solution of the given simultaneous equations is ( x, y ) = ( - 1, - 2 ).
Additional Information:
1. Linear Equations in two variables:
The equation with the highest index ( degree ) 1 is called as linear equation. If the equation has two different variables, it is called as 'linear equation in two variables'.
The general formula of linear equation in two variables is
ax + by + c = 0
Where, a, b, c are real numbers and
a ≠ 0, b ≠ 0.
2. Solution of a Linear Equation:
The value of the given variable in the given linear equation is called the solution of the linear equation.