Question

For which system of equations would elimination be the simplest technique to choose?
A. y = 2x and x + 3y = 5
B. 4x + 3y = 6 and 3y = 5
C. x + y = 7 and x - y = 12
D. 3x - 2y = 8 and 4x - 5y = 20

Answer 1

elimination means that by adding or subtracting the 2 equations, you can reduce the equation with one variable only
for the given choice
A. you should use substitution
B same as A
C elimination, as you can add up the 2 equations to get 2x = 19
D you can use both sub. and elimination but you need to change the subject or multiplying the equation