Question

Which is the best first step and explanation for solving this system of equations?

3x+4y=12
3x=2y-8​

Answer 1

x=-4/9, y=10/3. (-4/9, 10/3).

Explanation:

3x+4y=12

3x=2y-8

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2y-8+4y=12

6y-8=12

6y=12+8

6y=20

y=20/6

simplify,

y=10/3

3x=2(10/3)-8

3x=20/3-8

3x=20/3-24/3

3x=-4/3

x=(-4/3)/3

x=(-4/3)(1/3)=-4/9

x=-4/9, y=10/3. (-4/9, 10/3).

Answer 2

Explanation: