Question

what to do next. find value of x and y

Answer 1

3x + y = 40 --------(1)

4x + 2y = 50 -------(2)

On multiplying equation (1) by 2, we get

6x + 2y = 80 -------(3)

On subtracting equation 2 from 3, we get

2x = 30

=> x = 15

Now,

On substituting the value of x in equation 1, we get

3 (15) + y = 40

=> 45 + y = 40

=> y = - 5

Answer 2

HEY THERE ..!!

HERE IS YOURS SOLUTION;

◆ 3x + y = 40

◆ 4x + 2y = 50


LETS BEGIN;

◆ 3x + y - 40 = 0 ------1)

◆ 4x + 2y - 50 = 0 --------2)

Here we us Elimination Method to get values of x & y.

2(3x + y - 40 = 0)

1(4x + 2y - 50 = 0)

【 Multipled by the coefficient of y】

=> 6x + 2y - 80 = 0

=> 4x + 2y - 50 = 0

Now, we subtract;

2x - 30 = 0

=> x = 30 ÷ 2

=> x = 15

Put x in eq" 1)

=> 3x + y - 40 = 0 ------1)

=> 3 (15) + y - 40 = 0

=> 45 + y - 40 = 0

=> 5 + y = 0

=> y = -5


★So, the value of x = 15 & y = -5★


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