Question

help please guys

Answer 1

Use elimination to find the solution to the system of equations.

5x+2y=45

5x-7y=0

Answer 2

@JayBaybie can u help me

Answer 3

Sorry I have no Idea how to do system of equations Im not that good at them @bbcream14 can you help her??:))

Answer 4

Eliminate one variable. For Example:
2x+3y=10
3x-4y=-2
Sometimes the equations need to be adjusted by
multiplication before they can be added or
subtracted to eliminate a variable. Multiply one
or both equations to set them up for elimination.
Multiply the first equation by 3:
3(2x + 3y) = 10(3) ⇒ 6x + 9y = 30

Multiply the second equation by -2:
!2(3x ! 4y) = !2 "(!2) ⇒ !6x + 8y = 4
Decide whether to add or subtract the equations
to eliminate one variable. Since the x-terms are
additive opposites, add these equations.
6x + 9y = 30
!6x + 8y = 4
17y = 34 so y = 2.
Substitute the solution for y into either of the
original equations to solve for the other variable.
2x + 3(2) = 10 ⇒ 2x = 4 ⇒ x = 2 √
Check the solution (2, 2) in the second equation.
3(2) ! 4(2) = !2 ⇒ 6 !8 = !2 ⇒ !2 = !2 √