Question

9) Select the best method to solve the system.

4x+4y=16
2x-2y=6

*elimination
*substitution

Answer 1

elimination

Explanation:

multiply 2nd eqn by 2 and take eqn 1 - eqn 2 and you'll get rid of x term, leaving only the y term and a constant, where you can then easily solve for y and sub to get x

Topic: simultaneous eqn

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Answer 2

Substitution because you need to substitute one of the variables