MATH SOLVE

3 months ago

Q:
# 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

Accepted Solution

A:

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 = 5220x + 4y = 120-----------------------17x = -68Divide by -17.x = 4Substitute x = 4 and solve for y.3(4) + 4y = 5212 + 4y = 524y = 40y = 10