6x + 3y = 3

- 2x + 4y = - 6
using the elimination strategy

(1, 1)

Step-by-step explanation:

Keep 6x + 3y = 3 how it is and multiply 3 to the next equation.

-2x + 4y = -6

-6x + 12y = -18

Now add the equations:

-6x + 12y = -18

6x + 3y = 3

15y = -15

Solve for y by dividing:

15y = -15

y = -1

Since we got y, substitute -1 into the first equation:

6x + 3y = 3

6x + 3 (-1) = 3

Now just solve for x by adding 3 to both sides:

6x + -3 + 3 = 3 + 3

6x = 6

Now divide 6 by both sides:

6x/6 6/6

X = 1

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step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb