Question

solve the system of equations
{3x-y=6
{ 6x+y=21
explain the steps on how to do this please

Answer 1

Easy

Answer 2

Add both the equations

Answer 3

x=3

Answer 4

-y +y will be cancelled.

Answer 5

3x-y=6
6x+y=21
======
9x=27
x=27/9
x=3

Answer 6

There are different methods of solving systems of equations. Since you don't mention a specific method, I suggest addition.

Add the two equations. The y variables will add to zero, leaving an equation with only the x variable. Then solve the equation for x.

Answer 7

Now put the value of x in eq no.2
6x+y=21
6(3)+y=21
18+y=21
y=21-18
y=3


(3,3)

Answer 8

thank you so much that really helped

Answer 9

yw