Question

Helpppp asap using elimination!

7x - 9y =-30

-3x - 6y = 3

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Answer 1

An equation is formed when two equal expressions. The solution of the system of equation is (-3,1).

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Multiply the first equation by 2 and the other equation by -3. Therefore, the two equations will be,

• 2(7x-9y) = 2(-30)

         14x - 18y = -60

• -3(-3x - 6y) = -3(3)

         9x + 18y = -9

Add the two equations,

14x - 18y + 9x + 18y = -9 -60

23x = -69

x = -3

Substitute the value of x in any one of the two given equations,

7(-3) - 9y =-30

-21 - 9y = -30

-9y = -9

y = 1

Hence, the solution of the system of equation is (-3,1).

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