Question

Choose the correct first step(s) to solve the system using substitution.

y = 5x and 2x + 3y = 34

Answer 1

assuming simultaneous, called y = 5x Eq.1 and 2x + 3y = 34 Eq.2

Multiply Eq.1 by 3 to get 3y = 15x, then substitute into Eq.2

Which yields 17x = 35 and therefore x = 35/17

Then substitute x = 35/17 back into original Eq.1 to give y = 175/17

Answer 2

2x + 3(5x) = 34

2x + 15x = 34

17x = 34

x = 34/17

Answer 3

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