Question

1.2 X + 2.8 Y =4 , 2.8 X + 1.2 Y = 4. find in elimination method

Answer 1

Step-by-step explanation:

1.2X+2.8Y=4...(1)

2.8X+1.2Y=4...(2)

Multiply (1) by 2.8 and (2) by 1.2

3.36X+7.84Y=11.2...(1)

3.36X+1.44Y=4.8...(2)

Subtract (1) from(2) we get

(7.84-1.44)Y=11.2-4.8=>6.4Y=6.4=>

Y=6.4/6.4=1. Substitute Y=1 in equation(1) =>1.2X+2.8(1)=1 =>1.2X=4-2.8=1.2 =>X=1. Hence the solution for this system of linear equations given above is X=1 and Y=1. Hope it helps you.