Question

Select the best possible first step to solving the system by first eliminating the x variable. 4x + 9y = 21 3x - 8y = 1

Answer 1

make the coefficients of x equal
i mean u have 4 as x coefficient on left hand and 3 as x coefficient on right hand.
you have to make the coefficient of x as LCM of those two ie 3 and 4

Answer 2

Multiply the first equation by 3
Next, multiply the second equation by -4
Add the two equations, x term will be eliminated
Remember to multiply all the terms in the equation

Answer 3

or multiply first equation by -3 and second equation by 4