Mathematics: Solve using the elimination method: X-3y=7 3x + 3y=9

Step-by-step explanation:ang qt ko share ko lang bleeeh...

Solve using the elimination method: X-3y=7 3x + 3y=9

weeman6546

21.01.2022

$x=4\\\\y=-1$

Step-by-step explanation:

Given Equation:

x-3y=7 Equation:1

3x + 3y=9 Equation:2

Dividing Equation:2 by '3' both the sides:

x+y=3

or x=3-y Equation:3

Putting the vale of 'x' in Equation:1

x-3y=7

$(3-y)-3y=7\\\\3-y-3y=7\\\\3-4y=7\\\\$

Subtracting '3' both sides

$-4y=7-3\\\\-4y=4$

$y=\frac{4}{-4}$

y=-1

Putting value of 'y' in Equation:3

x=3-y

$x=3-(-1)\\\\x=3+1\\\\x=4$

The solution of the equations is :

$x=4\\\\y=-1$

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