change one or both equations to make one of the variables disappear x+y=3.75 14x-2y=4.5 please show step by step

Question

change one or both equations to make one of the variables disappear x+y=3.75 14x-2y=4.5 please show step by step

Answer 1

Use the Elimination Method

 

    2(x + y = 3.75)

+ 14x - 2y = 4.5

 

16x = 12

x = 12/16 = 3/4 = 0.75

 

x + y = 3.75

0.75 + y = 3.75

y = 3.75 - 0.75 = 3

 

The solution is (0.75, 3)