Question

Which first step for solving the given system using substitution results in an equation without fractions?

(2x+6y=7
(6x + 18y = 24
O
O
Solve for x in the first equation,
Solve for y in the first equation,
Solve for x in the second equation

Answer 1

(c) Solve for x in the second equation

Explanation:

All of the coefficients in the second equation are multiples of the coefficient of x, so it can be reduced to ...

x +3y = 4

Solving that equation for x does not involve any fractions.

x = 4 -3y

If you solve for x in the second equation, the result is an equation without fractions.