Question

Use the elimination method to solve the system of equations. Choose the correct ordered pair.

4x + 7y = 60
-4x + 7y = -4

A. (8, 4)
B. (2, 4)
C. (1, 0)
D. (4, 7)

Answer 1

D

Answer 2

This time, you add both equations.

Answer 3

altough you can solve it ,,but i recommend you to directly try and satisfy the given options with the given co-ordinates,,saves time ^^

Answer 4

\(\Large \color{purple}{\rightarrow 14y = 56 }\)
\(\Large \color{purple}{\rightarrow y = 4 }\)

Now,

\(\Large \color{purple}{\rightarrow 4x + 28 = -4 }\)

\(\Large \color{purple}{\rightarrow 4x = -24 }\)

\(\Large \color{purple}{\rightarrow x = -6 }\)

Answer 5

Oops, wait.

Answer 6

a

Answer 7

\(\Large \color{purple}{\rightarrow -4x + 28 = -4 }\)
\(\Large \color{purple}{\rightarrow -4x = -32 }\)
\(\Large \color{purple}{\rightarrow 4x = 32 }\)
\(\Large \color{purple}{\rightarrow x = 8 }\)

You get (8,4)

Answer 8

@shubhamsrg It's mentioned to solve by elimination

Answer 9

if options are given it has to be an objective problem buddy..i dont think you need to show rough work here to the examiner..