Question

Choose all that give a correct first step to solve the system of equations by the elimination method. Equation A: 3x + 4y = 52 Equation B: 5x + y = 30 Multiply Equation B by ?4 Equation A: ?2x + 3y = ?1 Equation B: x + 5y = 25 Multiply Equation B by 2 Equation A: 2x + y = 2 Equation B: ?3x + 3y = 10 Multiply Equation A by 5 Equation A: 4x + y = 3 Equation B: 6x + 3y = 9 Multiply Equation A by ?3

Answer 1

Answer:

Multiply equation B by 4.

Step-by-step explanation:

Solve equation A 3x + 4y = 52 and equation B 5x + y = 30 by multiplying equation B by 4.

This becomes 3x + 4y = 52 and 20x + 4y = 120.

Subtract the equations.

3x + 4y = 52

20x + 4y = 120

----------------------

-17x = -68

Divide by -17.

x = 4

Substitute x = 4 and solve for y.

3(4) + 4y = 52

12 + 4y = 52

4y = 40

y = 10

Answer 2

Answer:A,B, and D

Step-by-step explanation: