If you multiply the first equation by 6, the following
system is the result.
3x + 9y = -42
-3x + 2y = -2
to solve this system by elimination, the equations.

the answer is add.

Step-by-step explanation:

adding -3x and 3x will eliminate them both.

ADD

Explanation:

We are given two equations, in which first is multiplied by 6. Multiplying or dividing the entire equation with the same number doesn't change the values of x and y.

So, now to solve this by elimination, we first have to make coefficient of any one variable equal then we either subtract or add the equations.

Since, the coefficients of x are equal and of opposite sign, we will add the equations which will give us the value of

y = 4 and substituting this value in any of the equations,

say in equation -3x + 2y = -2 ,

put y= 2, and

solve for x, we obtain

x = 2.