Solve the following pair of equations.

Coach Jhon buys 20 bats and 5 balls for his team.
A ball costs x rupees and a bat costs y rupees. John spends a total of 400 rupees on these two items.
Express x in terms of y.

2x +y = 10 Complete the missing value in the solution to the equation. (……..,- 6 )

James  needs to solve the system of equations using elimination.
-3x + 5y = 15 and  2x – 5y = -15
What variable should James should solve first

Solve the system of equations using elimination.
3x + 2y = -13    and     -3x+y= 25

3x – y =12
3x + 5y = -6

-5x – 2y = 9
-2x + 3y = 15

4x – 5y = -5
4x – 4y = 0

4x – 4y = 4
x – 3y = 5

x – 5y = 20
x – y = 4

-x – y = -5
-3x + 3y = -3

3y = 15
-3x – 5y = -10

-4x – 5y = -1
-2x – 5y = 7

-2x – 5y = 10
-x – y = -1

-5x + y = -3
5x – 4y = 12

We can solve the equation in two variable using elimination method, substitution method and cross multiplication method. In elimination method we can find the solution of the two variables by cancelling one variable by adding, multiplying or subtracting both the equations from which we will get the value of one variable. After getting the value of one variable we can put the value of that variable in equation and get the value of another variable.

4x - 4y = 16
2x + y = -1

We can solve the equation in two variable using elimination method, substitution method and cross multiplication method. In elimination method we can find the solution of the two variables by cancelling one variable by adding, multiplying or subtracting both the equations from which we will get the value of one variable. After getting the value of one variable we can put the value of that variable in equation and get the value of another variable.